Abrams, L. 1968. ILLUSTRATED FLORA OF THE PACIFIC STATES. VOLUMES 1-4. Stanford University Press, Stanford, CA. Vol. 1-538 pp; Vol 2-635 pp; Vol.. 3-866 pp; Vol. 4-732 pp

Ahmadjian, V. 1979. FLOWERING PLANTS OF MASSACHUSETTS. University of Massachusetts Press, Amherst, MA. 582 pp.

Ajilvsgi, G. 1979. WELD FLOWERS OF THE BIG THICKET, EAST TEXAS AND WESTERN LOUISIANA. Texas A&M University Press, College Station, TX. 360 pp.

Allen, C.M. 1980. GRASSES OF LOUISIANA. University of Southwestern Louisiana, Lafayette, LA. 358 pp.

Allen, S.D., F.C. Golet, A.F. Davis, and T.E. Sokoloski. 1989. SOIL-VEGETATION CORRELATIONS IN TRANSITION ZONES OF RHODE ISLAND RED MAPLE SWAMPS. (In Press.) US Fish and Wildlife Service, Washington, DC.

Arctic Geobotanical Atlas. 2006. Alaska Geobotany Center.  (http://www.arcticatlas.org/photos/index)

Ash, A.N. 1983. NATURAL AND MODIFIED POCOSINS: LITERATURE SYNTHESIS AND MANAGEMENT OBJECTIVES. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-83/ 04. 156 pp.

Baad, M.F. 1988. SOIL-VEGETATION CORRELATIONS WITHIN THE RIPARIAN ZONE OF BUTTE SINK IN THE SACRAMENTO VALLEY OF NORTHERN CALIFORNIA. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 88(25). 48 pp.

Bahr, L.M., and W.P. Lanier. 1981. THE ECOLOGY OF INTERTIDAL OYSTER REEFS OF THE SOUTH ATLANTIC COAST: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81/15.105 pp.

Bailey, R. G. 1995. Description of the Ecoregions of the United States, second edition. Miscellaneous Publication 1391 (revised). U.S. Department of Agriculture, Forest Service. Washington, DC. (http://www.fs.fed.us/land/ecosysmgmt/ecoreg1_home.html)

Bailey, R. G. (1998). Ecoregions: The ecosystem geography of the oceans and continents, Springer-Verlag, New York.

Barbour, M. G., and W. D. Billings. 1989. North American terrestrial vegetation. New York: Cambridge University Press.

Barbour, M.G. and J. Major. 1977. TERRESTRIAL VEGETATION OF CALIFORNIA. John Wiley and Sons, New York, NY. 1002 pp.

Barkley, T.M. 1968. A MANUAL OF THE FLOWERING PLANTS OF KANSAS. Kansas State University Endowment Association, Manhattan KS. 402 pp.

Barkley, T.M. 1977. ATLAS OF THE FLORA OF THE GREAT PLAINS. The Iowa State University Press, Ames, IA. 600 pp.

Batson, W.T. 1977. GENERA OF THE EASTERN PLANTS: A GUIDE TO THE GENERA OF NATIVE AND COMMONLY INTRODUCED FERNS AND SEED PLANTS OF EASTERN NORTH AMERICA. John Wiley and Sons, NY.

Batson, W.T. 1982. GENERA OF THE WESTERN PLANTS. The State Printing Company, Columbia, SC. 207 pp.

Batten, A.R. 1980. A PROPOSED CLASSIFICATION FRAMEWORK FOR ALASKA WETLAND AND AQUATIC VEGETATION. Institute of Arctic Biology, University of Alaska, Fairbanks, AK. 135 pp.

Batten, A.R., and B.F. Murray. 1982. A LITERATURE SURVEY OF. THE WETLAND VEGETATION OF ALASKA. Institute of Arctic Biology, University of Alaska, Fairbanks, AK. 222 pp.

Beal, E.O. 1977. A MANUAL OF MARSH AND AQUATIC VASCULAR PLANTS OF NORTH CAROLINA WITH HABITAT DATA. North Carolina Agricultural Experiment Station, Raleigh, NC. 298 pp.

Beal, E.O., and J.W. Thieret. 1986. AQUATIC AND WETLAND PLANTS OF KENTUCKY. Kentucky Nature Preserves Commission. Soil and Technical Service Publ. No. 5. 315 pp.

Belzer, T.J. 1984. ROADSIDE PLANTS OF SOUTHERN CALIFORNIA. Mountain Press Publishing Company, Missoula, MT. 158 pp.

Benson, L., and R.A. Darrow. 1981. TREES AND SHRUBS OF THE SOUTHWESTERN DESERTS. University of Arizona Press, Tuscon, AZ. 416 pp.

Billington, C. 1948. SHRUBS OF MICHIGAN. Cranbrook Institute of Science, Bloomfield Hills, MI. Bulletin 20. 339 pp.

Billington, C. 1952. FERNS OF MICHIGAN. Cranbrook Institute of Science, The Cranbrook Press, Bloomfield Hills, MI. Bulletin 32. 240 pp.

Birkehead, P.W. 1984. SOILS AND GEOMORPHOLOGY. Oxford University Press, New York, NY. 372 pp.

Black, C.A. 1968. SOIL - PLANT RELATIONSHIPS. John Wiley & Sons, Inc., New York, NY.

Boettinger, J. L. 1997. Aquisalids (Salorthids) and other wet saline and alkaline soils: Problems identifying aquic conditions and hydric soils. In: Aquic conditions and hydric soils: The problem soils. Special Publication Number 50, 79–97. Madison, WI: Soil Science Society of America.

Booth, W.E. 1972. GRASSES OF MONTANA. Montana State University, Bozeman, MT. 64 pp.

Booth, W.E., and J.C. Wright. 1967. FLORA OF MONTANA. PART 2. Montana State University, Bozeman, MT. 305 pp.

Bourna, J. 1983. HYDROLOGY AND SOIL GENESIS OF SOILS WITH AQUIC MOISTURE REGIMES. In: L.P. Wilding, N.E. Smeck, and G.F. Hall (editors), PEDOGENESIS AND SOIL TAXONOMY. I. CONCEPTS AND INTERACTIONS. Elsevier Science Publishers, B.V. Amsterdam. pp. 253-281.

Brabander, J.J., R.E. Masters, and R.M. Short. 1985. BOTTOMLAND HARDWOODS OF EASTERN OKLAHOMA. US Fish and Wildlife Service, Tulsa, OK and Oklahoma Department of Wildlife Conservation, Oklahoma City, OK. 83 pp + appendices.

Brady, Nyle C. 1974. THE NATURE AND PROPERTIES OF SOILS. MacMillan Publishing Co., Inc. 639 pp.

Braun, E.L. 1946. AN ANNOTATED CATALOG OF SPERMATOPHYTES OF KENTUCKY. John S. Swift Co., Inc., Cincinnati, OH. 161 pp.

Braun, E.L. 1967. THE VASCULAR FLORA OF OHIO. VOLUME I. THE MONOCOTYLEDONEAE. Ohio State University Press, Columbus, OH. 464 pp.

Britton, N.L., and H.A. Brown. 1970. AN ILLUSTRATED FLORA OF THE NORTHERN UNITED STATES AND CANADA, VOLUMES 1,2, AND 3. Dover Publications, Inc., New York, NY. Vol. I680 pp, Vol 2-735 pp, Vol 3-637 pp.

Britton, N.L., and W. Wilson. 1924. BOTANY OF PUERTO RICO AND THE VIRGIN ISLANDS Scientific Survey of Puerto Rico and the Virgin Islands Vol. 5, 6 Part 1, Descriptive Flora-Spermatophyta. New York Academy of Sciences, New York, NY.

Brockway, D.G., C. Topik, M.A. Hernstrom, and W.H. Emmingham. 1983. PLANT ASSOCIATION AND MANAGEMENT GUIDE FOR THE PACIFIC SILVER FIR, ZONE. USDA, Forest Service,- Portland, OR. Publ. No. R6-ECOL-130a-1983.

Brooks, E., and L.A. Hauser. 1981. AQUATIC VASCULAR PLANTS OF KANSAS I: SUBMERGED AND FLOATING LEAVED PLANTS. State Biological Survey of Kansas, The University of Kansas, Lawrence, KS.

Brooks, R.E. 1986. VASCULAR PLANTS OF KANSAS: A CHECKLIST. Kansas Biological Survey, The University of Kansas Press, Lawrence, KS. 129 pp.

Brostoff, W. N. 2002. Algae of a cryptobiotic crust dominated dune/pan system in the Western Mojave Desert. Journal of Arid Environments 51: 339–361.

Brown, C.A. 1972. WELD FLOWERS OF LOUISIANA AND ADJOINING STATES. Louisiana State University Press, Baton Rouge, LA. 247 pp.

Brown, L. 1976. WEEDS IN WINTER. Houghton Mifflin Co., Boston, MA.

Brown, M.L. and R.G. Brown. 1972. WOODY PLANTS OF MARYLAND. Port City Press, Baltimore, MD.

Brown, M.L. and R.G. Brown. 1984. HERBACEOUS PLANTS OF MARYLAND. Port City Press, Baltimore, MD.

Buckman, H.O., and N.C. Brady. 1969. THE NATURE AND PROPERTIES OF SOILS. Macmillian Publishing Company, Ontario, Canada.

Buol, S.W., F.D. Hole, and R.J. McCracken. 1980. SOIL GENESIS AND CLASSIFICATION. The Iowa State University Press, Ames, IA. 406 pp.

Burkhalter, A.P., L.M. Curtis, R.L. Lazor, M.L. Beach, and J.C. Hudson. 1973. AQUATIC WEED IDENTIFICATION AND CONTROL MANUAL. Bureau of Aquatic Plant Research and Control, Florida Department of Natural Resources, Tallahassee, FL. 100 pp.

Chabreck, R.H. 1972. VEGETATION, WATER AND SOIL CHARACTERISTICS OF THE LOUISIANA COASTAL REGION. Louisiana Agricultural Experiment Station, Baton Rouge, LA. Bull. 664.72 p.

Chabreck, R.H., and R.E. Condrey. 1979. COMMON VASCULAR PLANTS OF THE LOUISIANA MARSH. Louisiana State University Center for Wetland Resources, Baton Rouge, LA. Sea Grant Publ. No. LSU-T-79-003. 116 pp.

Clark, J.R. and J. Benforado (editors). 1981. WETLANDS OF BOTTOMLAND HARDWOOD FORESTS; PROCEEDINGS OF A WORKSHOP ON BOTTOMLAND HARDWOOD FOREST WETLANDS OF THE SOUTHEASTERN UNITED STATES. Elsevier Scientific Publishing Company, NY.

Clark, L.J. 1974. LEWIS CLARK'S FIELD GUIDE TO WILDFLOWERS OF MARSHES AND WATERWAYS IN THE PACIFIC NORTHWEST. Gray's Publishing, Ltd., Sidney, BC.

Clewell, A.F. 1985. GUIDE TO THE VASCULAR PLANTS OF THE FLORIDA PANHANDLE. University Presses of Florida, Tallahassee, FL. 605 pp.

Cobb, B. 1963. A FIELD GUIDE TO THE FERNS AND THEIR RELATED FAMILIES OF NORTH-EASTERN AND CENTRAL NORTH AMERICA. Houghton Mifflin Co., Boston, MA. 281 pp.

Coker, W.C., and H.R. Totten. TREES OF THE SOUTHEASTERN STATES. University of North Carolina Press, Chapel Hill, NC. 417 pp.

Commission for Environmental Cooperation (CEC). 1997. Ecological regions of North America: Toward a common perspective. Montreal, Quebec, Canada. (http://www.cec.org/files/PDF/BIODIVERSITY/eco-eng_EN.pdf)

Copeland, B.J., R.G. Hodson, and S.R. Riggs. 1984. THE ECOLOGY OF THE PAMLICO RIVER, NORTH CAROLINA: AN ESTUARINE PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82/06. 83 pp.

Correll, D.S., and H.B. Correll. 1972. AQUATIC AND WETLAND PLANTS OF THE SOUTHWESTERN UNITED STATES. Environmental Protection Agency, Washington, DC. Publ. No. 16030 DNL 01/ 72. 1777 pp.

Correll, D.S., and M.C. Johnston. 1979. MANUAL OF THE VASCULAR PLANTS OF TEXAS. University of Texas, Dallas, TX. 1881 pp.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. CLASSIFICATION OF WETLANDS AND DEEPWATER HABITATS OF THE UNITED STATES. US Fish and Wildlife Service, Office of Biological Services, Washington, DC. Publ. No. FWS/OBS-79/31. 107 pp.

Crampton, B. 1974. GRASSES IN CALIFORNIA. University of California Press, Berkeley, CA. 178 pp.

Crawford, V. 1981. WETLAND PLANTS OF KING COUNTY AND THE PUGET SOUND LOWLANDS. King County, WA. 80 pp.

Cronquist, A., A.H. Holmgren, N.H. Holmgren and J.L. Reveal. 1972. INTERMOUNTAIN FLORA VASCULAR PLANTS OF THE INTERMOUNTAIN WEST, USA. Hafner Publishing Company, NY. (Two Vols.). 584 pp.

Cronquist, A.C. 1980. VASCULAR FLORA OF THE SOUTHEASTERN UNITED STATES. VOLUME I. ASTERACEAE. University of North Carolina Press, Chapel Hill, NC. 261 pp.

Curtis, J. 1971. THE VEGETATION OF WISCONSIN. University of Wisconsin Press, Madison, WI. 657 pp.

Dahl, T. E. 1990. Wetlands losses in the United States 1780’s to 1980’s. Washington, DC: U.S. Fish and Wildlife Service.

Damman, A.W.H. and T.W. French. 1987. THE ECOLOGY OF PEAT BOGS IN THE GLACIATED NORTHEASTERN UNITED STATES: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.16). 100 pp.

Davis, R.J. 1952. FLORA OF IDAHO. William C. Brown Company, Dubuque, IA. 828 pp.

Dawson, E.Y. 1966. SEASHORE PLANTS OF NORTHERN CALIFORNIA. University of California Press, Berkeley, CA. 103 pp.

Dean, B.E., A. Mason, and J.L. Thomas. 1973. WILD FLOWERS OF ALABAMA AND ADJOINING STATES. University of Alabama Press, Tuscaloosa, AL. 230 pp.

Dean, C.C. 1970. FLORA OF INDIANA. Lehre, J.P. Cramer, NY. 1236 pp.

Dick-Peddie, W.A., J.V. Hardesty, E. Muldavin, and B. Sallach. 1987. SOIL-VEGETATION CORRELATIONS ON THE RIPARIAN ZONES OF THE GILA AND SAN FRANCISCO RIVERS IN NEW MEXICO. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 871(9). 29 pp.

Diers, R., and J.L. Anderson. 1984. PART I. DEVELOPMENT OF SOIL MOTTLING. Soil Survey Horizons (Winter): 9-12.

Dittmer, H.J., E.F. Castetter, and O.M. Clark. 1954. THE FERNS AND FERN ALLIES OF NEW MEXICO. University of New Mexico Press, Albuquerque, NM. 139 pp.

Dom, R.D. 1977. MANUAL OF THE VASCULAR PLANTS OF WYOMING. 2 VOLUMES. Garland Publishing, Inc., NY. Vol. 1-538 pp; Vol. 111-960 pp.

Duncan, W.H. 1967. WOODY VINES OF THE SOUTHEASTERN UNITED STATES.. University of Georgia Press, Athens, GA. 76 pp.

Duncan, W.H., and L.E. Foote. 1975. WILDFLOWERS OF THE SOUTHEASTERN UNITED STATES. University of Georgia Press, Athens, GA. 296 pp.

Edmonds, W.J., G.M. Silberhorn, P.R. Cobb, G.P. Peacock, Jr., N.A. McLoda, and D.W. Smith. 1985. CLASSIFICATION AND FLORAL RELATIONSHIPS OF SEASIDE SALT MARSH SOILS IN ACCOMACK AND NORTHAMPTON COUNTIES, VIRGINIA. Virginia Agricultural Experiment Station, VA. Bull. 85-8.

Eggers, S.D. and D.M. Reed. 1988. WETLAND PLANTS AND PLANT COMMUNITIES OF MINNESOTA AND WISCONSIN. US Army Corps of Engineers, St. Paul District, St Paul, MN. 201 pp.

Eicher, A.L. 1988. SOIL-PLANT CORRELATIONS IN WETLANDS AND ADJACENT UPLANDS OF THE SAN FRANCISCO BAY ESTUARY, CALIFORNIA. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 88(21). 35 pp.

Eliott, M.E., and E.M. Hall. 1977. WETLANDS AND WETLAND VEGETATION OF HAWAII. US Army Corps of Engineers, Pacific Ocean Division, Fort Shafter, HI. 344 pp.

Elzinga, C. L., D. W. Salzer, and J. W. Willoughby. 1998. Measuring and monitoring plant populations. Bureau of Land Management Technical Reference 1730-1. Washington, DC: U.S. Department of the Interior.

Environmental Laboratory. 1987. Corps of Engineers Wetland Delineation Manual, Technical Report Y–87–1. U.S. Army Engineers Waterways Experiment Station, Vicksburg, MS.

Environmental Laboratory. 1987. Corps of Engineers Wetlands Delineation Manual. Technical Report Y-87-1. Vicksburg, MS: U.S. Army Engineer Waterways Experiment Station. (http://el.erdc.usace.army.mil/wetlands/pdfs/wlman87.pdf)

Erickson, M.E. and D.M. Leslie, Jr. 1987. SOIL-VEGETATION CORRELATIONS IN THE SANDHILLS AND RAINWATER BASIN WETLANDS OF NEBRASKA. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 87(11). 72 pp.

Erickson, N.E. and D.M. Leslie, Jr. 1989. SOIL-VEGETATION CORRELATIONS IN COASTAL MISSISSIPPI WETLANDS. (In Press.) US Fish and Wildlife Service, Washington, DC. 47 pp.

Eyles, D.E., and J.L. Robertson. 1963. A GUIDE AND KEY TO THE AQUATIC PLANTS OF THE SOUTHEASTERN UNITED STATES. USDI, Fish and Wildlife Service, Bureau of Sport Fisheries and Wildlife, Washington, DC. Circular 158 (reprint of Public Health Bulletin 286 (1944)). 151 pp.

Eyre, F.H. (editor) 1980. FOREST COVER TYPES OF THE UNITED STATES AND CANADA. Society of American Foresters, Washington, DC. 148 pp.

Faber, P.M. 1982. COMMON WETLAND PLANTS OF COASTAL CALIFORNIA. Pickleweed Press, Mill Valley, CA. 110 pp.

Faber, P.M., and R.F. Holland. 1988. COMMON RIPARIAN PLANTS OF CALIFORNIA, A FIELD GUIDE FOR THE LAYMAN. Pickleweed Press, Mill Valley, CA. 140 pp.

Fairbrothers, D.E., E.T. Moul, A.R. Essbach, D.N. Riemer, D.A. Schallock. 1979. AQUATIC VEGETATION OF NEW JERSEY. Extension Service, College of Agriculture, Rutgers-The State University, New Brunswick, NJ. Extension Bulletin No. 382.107 pp.

Fassett, N.C. 1975. A MANUAL OF AQUATIC PLANTS. University of Wisconsin Press, Madison, WI. 405 pp.

Federal Register. 1994. Changes in hydric soils of the United States. Washington, DC, July 13(current Hydric Soil definition)

Field, J. J. 2004. Hydrology literature review for ordinary high water mark delineation in the Arid Southwest. Chapter 2 in: Review of ordinary high water mark indicators for delineating arid streams in the Southwestern United States, ed. R. W. Lichvar and J. S. Wakeley. Technical Report ERDC TR-04-1. Hanover, NH:

Fish and Wildlife Service. 1979. ECOLOGICAL CHARACTERIZATION OF THE SEA ISLAND COASTAL REGION OF SOUTH CAROLINA AND GEORGIA. 6 Vols. US Fish and Wildlife Service, Washington, DC. Publ. FWS/OBS-79/40,79/41 & 79/42. Vol 1-212 pp.; Vol 11-321 pp.; Vol. M-620 pp.

Fish and Wildlife Service. 1980. AN ECOLOGICAL CHARACTERIZATION OF COASTAL MAINE. (Out of Print) US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-80/29.

Fish and Wildlife Service. 1981. AN ECOLOGICAL CHARACTERIZATION OF THE CENTRAL AND NORTHERN CALIFORNIA COASTAL REGION. 5 Vols. US Fish and Wildlife Service, Washington, DC. Publ. Nos. FWS/OBS-80/45 - 80/49. Vol. 1-209 pp.; Vol. 2-593 pp.; Vol IH-1352 pp.; Vol. IV1395 pp.; Vol. V-77 pp.

Fish and Wildlife Service. 1981. FISH AND WILDLIFE RESOURCES OF THE GREAT LAKES COASTAL WETLANDS WITHIN THE UNITED STATES. VOLUMES 1-6. US Fish and Wildlife Service, Washington, DC. Vol. 1-480 pp.; Vol 2-1351 pp.; Vol 3-530 pp.; Vol. 4-834 pp.; Vol. 5-1676 pp.; Vol. 6-901 pp.

Fleming, G., P. Genelle, and R.W. Long. 1976. WILD FLOWERS OF FLORIDA. Banyan Books, Inc., Miami, FL. 96 pp.

Fowells, H.A. 1965. SILVICS OF FOREST TREES OF THE UNITED STATES. USDA, Agriculture Handbook No. 27 1. Washington, DC. 762 pp.

Frayer, W. E., D. D. Peters, and H. R. Pywell. 1989. Wetlands of the California Central Valley: Status and trends 1939 to mid-1980’s. Portland, OR: U.S. Fish and Wildlife Service.

Freeze, R. A., and J. A. Cherry. 1979. Groundwater. Englewood Cliffs, NJ: Prentice-Hall. Gretag/Macbeth. 2000. Munsell® color. New Windsor, NY.

Gilkey, H.M., and L.J. Dennis. 1967. HANDBOOK OF NORTHWESTERN PLANTS. Oregon State University Bookstores, Inc., Corvallis, OR. 505 pp.

Glaser, P.H 1987. THE ECOLOGY OF PATTERNED BOREAL PEATLANDS OF NORTHERN MINNESOTA: ~ COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85 (7.14). 98 pp.

Gleason, H.A. 1952. THE NEW BRITTON AND BROWN ILLUSTRATED FLORA OF THE NORTHEASTERN UNITED STATES AND ADJACENT CANADA. Three Vols. 3rd. edition. Hafner Press, New York, NY. Vol 1-482 pp; Vol 11-655 pp; Vol. 111-595 pp.

Gleason, H.A. and A. Cronquist. 1963. MANUAL OF VASCULAR PLANTS OF NORTHEASTERN UNITED STATES AND ADJACENT CANADA. D. Van Nostrand Co., New York, NY.

Godfrey, R.K. and J.W. Wooten. 1979. AQUATIC AND WETLAND PLANTS OF SOUTHEASTERN UNITED STATES. MONOCOTYLEDONS. University of Georgia Press, Athens, GA.

Godfrey, R.K. and J.W. Wooten. 1981. AQUATIC AND WETLAND PLANTS OF SOUTHEASTERN UNITED STATES. DICOTYLEDONS. University of Georgia Press, Athens, GA.

Good, R.E., D.F. Whigham, and R.L. Simp son (editors). 1978. FRESHWATER WETLANDS. Academic Press, New York, NY.

Gosselink, J.G. 1984. THE ECOLOGY OF DELTA MARSHES OF COASTAL LOUISIANA: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-84/09. 134 pp.

Gould, F.W. 1975. TEXAS PLANTS - A CHECKLIST AND ECOLOGICAL SUMMARY. Texas A&M University System, The Texas Agricultural Experiment System, College Station, TX. 121 pp.

Gould, F.W. 1975. THE GRASSES OF TEXAS. Texas A&M University Press, College Station, TX. 653 pp.

Gould, F.W. 1977. GRASSES OF SOUTHWESTERN UNITED STATES. University of Arizona Press, Tucson, AZ. 352 pp.

Gould, F.W., and T.W. Box. 1965. GRASSES OF THE TEXAS COASTAL BEND (CALHOUN, REFUGIO, ARANSAS, SAN PATRICIO, AND NORTHERN KLEBERG COUNTIES). Texas A&M University Press, College Station, TX. 189 pp.

Gretag/Macbeth. (2000). Munsell® color. New Windsor, NY.

Grillos, S.J. 1966. FERNS AND FERN ALLIES OF CALIFORNIA. University of California Press, Berkeley, CA. 104 pp.

Grimm, W.C. 1957. THE BOOK OF SHRUBS. Bonanza Books, NY. 522 pp.

Grimm, W.C. 1970. HOME GUIDE TO TREES, SHRUBS, AND WILDFLOWERS. Bonanza Books, NY. 320 pp.

Groman, H.A., T.R. Henderson, E.J. Meyers, D.M. Burke, and J.A. Kusler (editors). 1985. WETLANDS OF THE CHESAPEAKE. Environmental Law Institute, Washington, DC.

Hahn, B.E. 1977. FLORA OF MONTANA: CONIFERS AND MONOCOTS. Montana State University, Bozeman, MT.

Hall, L.C. 1968. BIBLIOGRAPHY OF FRESHWATER WETLANDS ECOLOGY AND MANAGEMENT. Department of Natural Resources, Madison, WI.Res. Rpt. No. 33.

Hall, J. V., W. E. Frayer, and B. O. Wilen. (1994). Status of Alaska wetlands. U. S. Fish and Wildlife Service, Anchorage, AK.

Halverson, N. M. 1986. MAJOR INDICATOR SHRUBS AND HERBS ON NATIONAL FORESTS OF WESTERN OREGON AND SOUTHWESTERN WASIHNGTON. USDA, Forest Service, Portland, OR. Publ. No. R6-TM-229-1098.

Halverson, N.M., C. Topik, and R. Van Vickle. 1987. PLANT ASSOCIATION AND MANAGEMENT GUIDE FOR THE WESTERN HEMLOCK ZONE. USDA, Forest Service, Portland, OR. Publ. No. R6ECOL-232A-1986.

Hansen, P.L., S.W. Chadde, and R.D. Pfister. 1987. RIPARIAN DOMINANCE TYPES OF MONTANA. Review Draft. Montana Riparian Association, University of Montana, Missoula, MT * 358 pp.

Harlow, W.H. 1941. FRUIT KEY AND TWIG KEY TO TREES AND SHRUBS. Dover Publications, New York, NY.

Harlow, W.M. 1957. TREES OF THE EASTERN AND CENTRAL UNITED STATES AND CANADA. Dover Publications, Inc. New York, NY. 288 pp.

Harrington, H.D. 1964. MANUAL OF THE PLANTS OF COLORADO. Swallow Press, Inc., Chicago, IL. 666 pp.

Harrington, H.D. 1977. HOW TO IDENTIFY GRASSES AND GRASSLIKE PLANTS. The Swallow Press, Inc., Chicago. IL. 142 pp.

Harrington, H.D. 1979. MANUAL OF THE PLANTS OF COLORADO. Sage Books, Denver, CO. (2nd. edition).

Hartog, C.D. 1970. THE SEA-GRASSES OF THE WORLD. North-Holland Publishing, Company, Amsterdam. 275 pp.

Heinecke, T.E. 1987. THE FLORA AND PLANT COMMUNITIES OF THE MIDDLE MISSISSIPPI RIVER VALLEY. Ph.D. Dissertation. Southern Illinois University, Carbondale, IL. 653 pp.

Heller, C.A. 1966. WILD EDIBLE AND POISONOUS PLANTS OF ALASKA. Cooperative Extension Service, University of Alaska. Publ. No. 28. 89 pp.

Herdendorf, C.E. 1987. THE ECOLOGY OF COASTAL MARSHES OF WESTERN LAKE ERIE: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.9). 240 pp.

Herdendorf, C.E., C.N. Raphael, and E. Jawarski. 1986. THE ECOLOGY OF LAKE ST. CLAIR WETLANDS: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85 (7.7). 187 pp.

Hermann, F.J. 1970. MANUAL OF THE CARICES OF THE ROCKY MOUNTAINS AND COLORADO BASIN. 'USDA, Forest Service, Washington, DC. Agriculture Handbook No. 374. 397 pp.

Hermann, F.J. 1975. MANUAL OF THE RUSHES (JUNCUS SPP.) OF THE ROCKY MOUNTAINS AND COLORADO BASIN. USDA, Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, CO. Gen. Tech. Rpt. RM- 18. 107 pp.

Hettinger, L.R., and A.J. Lanz. 1974. VEGETATION AND SOILS OF NORTHEASTERN ALASKA. Arctic Gas Biological Report Series 21, 206.

Hickman, J. C. 1993. The Jepson Manual: Higher plants of California. Berkeley, CA: University of California Press.

Hitchcock, A.S. 1971. MANUAL OF THE GRASSES OF THE UNITED STATES. Dover Publications, New York, NY.. (Two Vols.).

Hitchcock, A.S. and A. Cronquist. 1973. FLORA OF THE PACIFIC NORTHWEST. University of Washington Press, Seattle, WA.

Hitchcock, A.S., A.C. Cronquist, M. Ownbey, and J.W. Thompson. 1977. VASCULAR PLANTS OF THE PACIFIC NORTHWEST. Vols. 1-5. University of Washington Press, Seattle, WA. Vol 1-914 pp, Vol 2-597 pp, Vol 3-614 pp, Vol. 4-510 pp, Vol. 5-343 pp.

Hobbie, J.E. 1984. THE ECOLOGY OF TUNDRA PONDS OF THE ARCTIC COASTAL PLAIN: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-83/25. 52 pp.

Holland, R.F. 1986. PRELIMINARY DESCRIPTIONS OF THE TERRESTRIAL NATURAL COMMUNITIES OF CALIFORNIA. California Department of Fish and Game. Sacramento, CA. 156 pp.

Hook, D.D. 1978. PLANT LIFE IN ANAEROBIC ENVIRONMENTS. Ann Arbor Science Publishers, Inc., Ann Arbor, MI. 564 pp.

Hopkins, W.E. 1979. PLANT ASSOCIATIONS OF THE FREMONT NATIONAL FOREST. USDA, Forest Service, Portland, OR. Publ. No. R6-ECOL-79-004. 106 pp.

Hopkins, W.E., and B.L. Kovalchik. 1983. PLANT ASSOCIATIONS OF THE CROOKED RIVER NATIONAL GRASSLAND, OCHOCO NATIONAL FORESTS. USDA, Forest Service, Portland, OR. Publ. R6-ECOL- 133-1983. 98 pp.

Horn, E.L. 1972. WILDFLOWERS OF THE PACIFIC CASCADES. The Touchtone Press, Beaverton, OR. 157 pp.

Hotchkiss, N. 1950. CHECKLIST OF MARSH AND AQUATIC PLANTS OF THE UNITED STATES. USDI, Fish and Wildlife Service, Washington, DC. Wildlife Leaflet No. 210.34 pp

Hotchkiss, N. 1964. PONDWEEDS AND PONDWEEDLIKE PLANTS OF EASTERN NORTH AMERICA. US Fish and Wildlife Service, Washington, DC. Circular 187. 30 pp.

Hotchkiss, N. 1965. BULRUSHES AND BULRUSHLIKE PLANTS OF EASTERN NORTH AMERICA. USDI, Fish and Wildlife Service, Washington, DC. Circular 221. 19 pp.

Hotchkiss, N. 1970. COMMON MARSH PLANTS OF THE UNITED STATES AND CANADA. US Fish and Wildlife Service, Washington, DC. Resources Publication No. 93.

Hotchkiss, N. 1972. COMMON MARSH, UNDERWATER AND FLOATING-LEAVED PLANTS OF THE UNITED STATES AND CANADA. Dover Publications, New York, NY.

Houston, M., and M. Vial. 1995. Birds of the channeled scablands of Eastern Washington. Jamestown, ND: Bureau of Land Management.

Hubbard, D.E., J.B. Millar, D.D. Malo, and K.F. Higgins. 1988. SOIL-VEGETATION CORRELATIONS IN PRAIRIE POTHOLES OF BEADLE AND DAUEL COUNTIES, SOUTH DAKOTA. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 88(22). 97 pp.

Hulten, E. 1868. FLORA OF ALASKA AND NEIGHBORING TERRITORIES: A MANUAL OF THE VASCULAR PLANTS. Stanford University Press, Stanford, CA. 1008 pp.

Hulten, E. 1960. FLORA OF THE ALEUTIAN ISLANDS (SECOND EDITION). Hafner Publishing Company, New York, NY. 460 pp.

Hunter, C.G. 1984. WILDFLOWERS OF ARKANSAS. The Ozark Society Foundation, Little Rock, AR. 296 pp.

Illinois Department of Conservation. 1988. A FIELD GUIDE TO THE WETLANDS OF ILLINOIS. State of Illinois. 240 pp.

International Rice Research Institute. 1985. WETLAND SOILS: CHARACTERIZATION, CLASSIFICATION AND UTILIZATION. Manila, Philippines.

Jepson, W.L. 1975. A MANUAL OF THE FLOWERING PLANTS OF CALIFORNIA. University of California Press, Berkeley, CA. 1238 pp.

Jolley, R. 1988. A COMPREHENSIVE FIELD GUIDE: WILDFLOWERS OF THE COLUMBIA RIVER GORGE. Oregon Historical Society Press, Portland, OR. 331 pp.

Jones, B. F. 1965. The hydrology and mineralogy of Deep Springs Lake, Inyo County, California. Professional Paper 502-A. Washington, DC: U.S. Geological Survey.

Jones, G.H. 1963. FLORA OF ILLINOIS. American Midland Naturalist Monograph No. 7. University of Notre Dame Press, Notre Dame, IN. 401 pp.

Jones, S.B. 1969. THE PTERIDOPHYTES OF MISSISSIPPI. Sida 3(6):359-364.

Jones, S.B. 1974. MISSISSIPPI FLORA. 1. MONOCOTYLEDON FAMILIES WITH AQUATIC OR WETLAND SPECIES. Gulf Research Reports 4(3):357-379.

Jones, S.B. 1974. MISSISSIPPI FLORA. II. DISTRIBUTION AND IDENTIFICATION OF THE ONAGRACEAE. Castanea 39(4):370-379.

Jones, S.B. 1974. MISSISSIPPI FLORA. VI. MISCELLANEOUS FAMILIES. Castanea 41(3): 189-212.

Jones, S.B. 1975. MISSISSIPPI FLORA. III. DISTRIBUTION AND IDENTIFICATION OF THE BRASSICACEAE. Castanea 40(3):238-252.

Jones, S.B. 1975. MISSISSIPPI FLORA. IV. DICOTYLEDON FAMILIES WITH AQUATIC OR WETLAND SPECIES. Gulf Research Reports 5(1):7-22.

Jones, S.B. 1976. MISSISSIPPI FLORA. V. THE MINT FAMILY Castanea 41(1):41-58.

Jones, S.B., and N.C. Coile. 1979. LIST OF GEORGIA PLANTS IN THE UNIVERSITY OF GEORGIA HERBARIUM. Herbarium, Department of Botany, University of Georgia, Athens, GA. 53 pp.

Josselyn, M 1983. THE ECOLOGY OF SAN FRANCISCO BAY TIDAL MARSHES: A COMMUNITY PRO . US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-83/23. 102 pp.

Justice, W.S., and C.R. Bell. 1968. WILDFLOWERS OF NORTH CAROLINA. University of North Carolina Press, Chapel Hill, NC. 217 pp.

Kartesz, J.T., and R. Kartesz. 1980. A SYNONYMIZED CHECKLIST OF THE VASCULAR FLORA OF THE UNITED STATES, CANADA, AND GREENLAND. The University of North Carolina Press, Chapel Hill, NC.498 pp.

Kearney, T.H. and R.H. Peebles. 1960. ARIZONA FLORA. University of California Press, Berkeley, CA. (2nd. edition).

Kent, M., and P. Coker. 1992. Vegetation description and analysis: A practical approach. New York: Wiley.

Klussmann, W.G., F.G. Lowman, and J.T. Davis. 1974. COMMON AQUATIC PLANTS OF TEXAS. Texas Agricultural Extension Service and Texas A&M University System. Publ. No. B- 1018. 16 pp.

Knoble, E. 1977. FIELD GUIDE TO THE GRASSES, SEDGES, AND RUSHES OF THE UNITED STATES. (Reprint). Dover Publishing, Inc., NY. 83 pp.

Kovalchik, B.E., W.E. Hopkins, and S.J. Brunsfeld. 1988. MAJOR, INDICATOR SHRUBS AND HERBS IN RIPARIAN ZONES ON NATIONAL FORESTS OF CENTRAL OREGON. USDA, Forest Service, Portland, OR. Publ. No. R6-ECOL-TP-005-88.

Kovalchik, B.L. 1987. RIPARIAN ZONE ASSOCIATIONS DESCHUTES, OCHOCO, FREMONT, AND WINEMA NATIONAL FORESTS. USDA, Forest Service, Portland, OR. Publ. No. R6-ECOLTP-274-87.

Kozlowski, T.T. (ed.) 984. FLOODING AND PLANT GROWTH. Academic Press, Inc., Orlando, FL.356 pp.

Kurz, H., and R.K. Godfrey. 1962. TREES OF NORTHERN FLORIDA. University of Florida Press, Gainesville, FL. 311 pp.

Laderman, A.D. (editor) 1987. ATLANTIC WHITE CEDAR WETLANDS. Westview Press, Inc., Boulder, CO.

Lakela, 0., and R.W. Long. 1976. FERNS OF FLORIDA. Banyon Books, Miami, FL. 178 pp.

Lakela. 0. 1965. FLORA OF NORTHEAST MINNESOTA. University of Minnesota Press, Minneapolis, MN. 541 pp.

Lamb, S.H. 1975. WOODY PLANTS OF THE SOUTHWEST: A FIELD GUIDE WITH DESCRIPTIVE TEXT. The Sunstone Press, Santa Fe, NM. 177 pp.

Larson, G.E., and W.T. Barker. 1980. THE AQUATIC AND WETLAND VASCULAR PLANTS OF NORTH DAKOTA. North Dakota Water Resources Research Institute, North Dakota State University, Fargo, ND. Project No. 064 NDAK, Research Project Technical Completion Report. 453 pp.

Laursen, G. A., R. D. Seppelt, and M. P. Zhurbenko. (2005). “Use of crytogams (Bryophytes, Lichenized Fungi, and Fungi) to further delineate Alaskan obligate wetlands and facultative uplands - Phase One: A pilot study for interior and south central physiographic regions,” unpublished contract report No. W913E5-04-C-0002 to the U. S. Army Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH.

Lichvar, R., Laursen, G., Seppelt, R., and Ochs, W. (2006, in prep.). “Selection and testing of reliable cryptogam species for use in a hydrophytic vegetation indicator in Alaska,” Technical Note __, U. S. Army Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory, Hanover, NH.

Lichvar, R., W. Brostoff, and S. Sprecher. 2006. Surficial features associated with ponded water on playas of the arid southwestern United States: Indicators for delineating regulated areas under the Clean Water Act. Wetlands 26: 385–399.

Lindstrom, L.E. 1968. THE AQUATIC AND MARSH PLANTS OF THE GREAT PLAINS OF CENTRAL NORTH AMERICA. Ph.D. Dissertation. Kansas State University, Manhattan, KS. 247 pp.

Little, E.L. 1971. ATLAS OF UNITED STATES TRESS, VOLUME, I. CONIFERS AND IMPORTANT HARDWOODS. USDA, Forest Service, Washington, DC. Miscellaneous Publ. No. 1146.9 pp, 200 maps.

Little, E.L. 1976. ATLAS OF UNITED STATES TREES. VOLUME III. MINOR WESTERN HARDWOODS. USDA, Forest Service, Washington, D.C. Miscellaneous Publ. No. 1314.13 pp., 210 maps.

Little, E.L. 1976. SOUTHWESTERN TREES. USDA, Forest Service, Washington, DC. Agric. Handbook No. 9. 109 pp.

Little, E.L. 1978. ATLAS OF UNITED STATES TREES. VOLUME 5. FLORIDA. USDA, Forest Service, Washington, DC. Miscellaneous Publ. No. 1361. 256 pp.

Little, E.L. 1979. CHECKLIST OF UNITED STATES TREES (NATIVE AND NATURALIZED). USDA, Forest Service, Washington, DC. Agricultural Handbook No. 541. 375 pp.

Little, E.L. 1985. THE AUDUBON SOCIETY FIELD GUIDE TO NORTH AMERICAN TREES: EASTERN REGION. Alfred A. Knopf, Inc., New York, NY.

Little, E.L., R.D. Woodbury, and F.H. Wadsworth. 1974. TREES OF PUERTO RICO AND THE VIRGIN ISLANDS: SECOND VOLUME. USDA, Forest Service, Washington, DC. Agric. Handbook No. 449. 1024 pp.

Livingston, R.J. 1984. THE ECOLOGY OF APALACHICOLA BAY SYSTEM: AN ESTUARINE. PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82/05.148 pp.

Lloyd, R.M., and R.S. Mitchell. 1973. A FLORA OF THE WHITE MOUNTAINS, CALIFORNIA AND NEVADA. University of California Press, Berkeley, CA. 202 pp.

Long, R.W. and 0. Lakela. 1976. A FLORA OF TROPICAL FLORIDA. Banyan Books, Miami, FL.

Looman, J. 1982. PRAIRIE GRASSES IDENITFIED AND DESCRIBED BY VEGETATIVE CHARACTERISTICS. Agriculture Canada Research Station, Swift Current, SIC Publ. 1413. 244 pp.

Loughmiller, C., and L. Loughmiller. 1984. TEXAS WILDFLOWERS. University of Texas Press, Austin, TX. 271 pp.

Lowe, E.N. 1921. PLANTS OF MISSISSIPPI. Mississippi State Geological Survey, MS. Bulletin No. 17. 295 pp.

Lytle, S.A. 1968. THE MORPHOLOGICAL CHARACTERISTICS AND RELIEF RELATIONSHIPS OF REPRESENTATIVE SOILS IN LOUISIANA. Louisiana Agricultural Experiment Station. Bull. No. 631. 23 pp.

Lytle, S.A., and B.N. Driskell. 1954. PHYSICAL AND CHEMICAL CHARACTERISTICS OF THE PEATS, MUCKS AND CLAYS OF THE COASTAL MARSH AREA OF ST. MARY PARISH, LOUlSIANA. Louisiana Agricultural Experiment Station. Bull. No. 484. 37 pp.

Mackenzie, K.K. 1940. NORTH AMERICAN CARICEAE, VOLS. I-II. New York Botanical Garden, NY. 543 pp.

Magee, D.W. 1981. FRESHWATER WETLANDS: A GUIDE TO COMMON INDICATOR PLANTS OF THE NORTHEAST. University of Massachusetts Press, Amherst, MA. 245 pp.

Markon, C. J. (2001). Seven-year phenological record of Alaskan ecoregions derived from advanced very high resolution radiometer normalized difference vegetation index data. U. S. Geological Survey Open-File Report 01-11, 58 pp. (http://agdcftp1.wr.usgs.gov/pub/projects/lcc/ak_avhrr/pheno_ofr_final.pdf)

Markovits, P.S. (editor). 1981. PROCEEDINGS - U.S. FISH AND WILDLIFE SERVICE WORKSHOP ON COASTAL ECOSYSTEMS OF THE SOUTHEASTERN UNITED STATES. US Fish and Wildlife Service, Washington, DC Publ. No. FWS/OBS-80/59.257 pp.

Martin, W.C., and C.R. Hutchins. 1981. A FLORA OF NEW MEXICO. J. Cramer, Braunchweig, West Germany. 2591 pp.

Mason, H. L. 1957. FLORA OF THE MARSHES OF CALIFORNIA. University of California Press, CA. 897 pp.

Massey, A.B. 1961. VIRGINIA FLORA. Virginia Agricultural Experiment Station, Blacksburg, VA. Tech. Bull. No. 155. 258 pp.

Mathews, F.S. 1915. FIELD BOOK OF AMERICAN TREES AND SHRUBS. G.P. Putnam and Sons, NY. 537 pp.

Mathews, F.S. 1955. FIELD BOOK OF AMERICAN WILD FLOWERS. G.P. Putnam and Sons, New York, NY. 601 pp.

Matsumura, Y. 1955. THE TRUE AQUATIC VASCULAR PLANTS OF COLORADO. Colorado Agricultural Experiment Station, Colorado Ag. and Mech. College, Ft. Collins, CO. 130 pp.

Mattoon, W.R. 1977. FOREST TREES OF FLORIDA. Tenth Edition. Florida Department of Agriculture and Consumer Services, Division of Forestry, Tallahassee, FL. 98 pp.

Mausbach, M.J., and J.L. Richardson. 1994. Biogeochemical Processes in hydric soils. Current Topics in Wetland Biogeochemistry 1:68-127,Wetlands Biogeochemistry Institute, Louisiana State Univ. Baton Rouge, LA.

McCormick, 1. 1970. THE PINE BARRENS: A PRELIMINARY ECOLOGICAL INVENTORY. New Jersey State Museum, Trenton, NJ. Research Report No. 2. 100 pp.

McCormick, J. 1978. VEGETATION TYPICAL OF ALASKAN WETLANDS. Kenai River Review, US Army Corps of Engineers District, Alaska Corps of Engineers. 15 pp.

McDonald, C.B. 1983. POCOSINS: A CHANGING WETLAND RESOURCE. US Fish and Wildlife Service, Washington, DC Publ. No. FWS/OBS-83/32.22 pp.

McDougall, W.B. 1973. SEED PLANTS OF NORTHERN ARIZONA. Museum of Northern Arizona, Flagstaff, AZ. 594 pp.

McGregor, R.L. 1986. FLORA OF THE GREAT PLAINS. University of Kansas Press, Lawrence, KS. 1392 pp.

McMinn, H.E. 1974. AN ILLUSTRATED MANUAL OF CALIFORNIA SHRUBS. University of California, Press, Berkeley, CA. 663 pp.

Mitsch, W.J. and J.G. Gosselink. 1986. WETLANDS. Van Nostrand Reinhold Co., Inc., New York, NY.

Mitsch, W.J., et al. 1983. ATLAS OF WETLANDS IN THE PRINCIPAL COAL SURFACE MINING REGION OF WESTERN KENTUCKY. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82172.134 pp.

Mohlenbrock, R.H. 1967. THE ILLUSTRATED FLORA OF ILLINOIS. Multiple Vols. Southern Illinois University Press, Carbondale, IL.

Mohlenbrock, R.H. 1975. GUIDE TO THE VASCULAR FLORA OF ILLINOIS. Southern Illinois University Press, Carbondale, IL. 494 pp.

Mohlenbrock, R.H. 2005. Aquatic and Standing Water Plants of the Central Midwest: Cypeeraceae Sedges. Southern Illinois University Press, Carbondale, IL. 272 pp.

Mohlenbrook, R.H., and D.M. Ladd. 1978. DISTRIBUTION OF ILLINOIS VASCULAR PLANTS. Southern Illinois University Press, Carbondale and Edwardsville, IL. 281 pp.

Mohr, C. 1901. PLANT LIFE OF ALABAMA. Alabama Edition, The Brown Printing Company, Montgomery, AL. 519 pp.

Moldenke, H.N. 1949. AMERICAN WILD FLOWERS. D. Van Nostrand Company, Inc., New York, NY. 543 pp.

Morley, T. 1969. SPRING FLORA OF MINNESOTA, INCLUDING COMMON CULTIVATED PLANTS. 'Me University of Minnesota Press, Minneapolis, MN. 283 pp.

Moyle, J.B. 1953. A FIELD KEY TO THE COMMON NON-WOODY FLOWERING PLANTS AND FERNS OF MINNESOTA. Burgess Publishing Co., Minneapolis, MN. 72 PP.

Mueller-Dombois, D. and H. Ellenberg. (1974). Aims and methods of vegetation ecology. John Wiley & Sons, NY.

Muenscher, W.C. 1950. KEYS TO WOODY PLANTS. Cornell University Press, Ithaca, NY.

Muenscher, W.C. 1972. AQUATIC PLANTS OF THE UNITED STATES. Cornell University Press, Ithaca, NY.

Muller, S. W. (1945). “Permafrost or permanently frozen ground and related engineering problems,” U.S. Engineers Office, Strategic Engineering Study Special Report 62, 136 pp.

Munz, P.A. 1964. SHORE WILDFLOWERS OF CALIFORNIA, OREGON, AND WASHINGTON. University of California Press, CA.

Munz, P.A. 1974. A FLORA OF SOUTHERN CALIFORNIA. University of California. Press, Berkeley, CA. 1086 PP.

Nachlinger, J.L. 1988. SOIL-VEGETATION CORRELATIONS IN RIPARIAN AND EMERGENT WETLANDS, LYON COUNTY, NEVADA. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 88(17). 39 pp.

National Research Council. 1995. Wetlands: characteristics and boundaries. National Academy Press, Washington, DC.

Nelson, E.N., and R.W. Couch. 1985. AQUATIC PLANTS OR OKLAHOMA. 1: -SUBMERSED, FLOATING-LEAVED, AND SELECTED EMERGENT MACROPHYTES. Oral Roberts University, Tulsa, OK. 111 pp.

Nelson, R.A. 1969. HANDBOOK OF ROCKY MOUNTAIN PLANTS. Dale Stuart King, Tuscon, AZ. 331 pp.

Newcomb, L. 1977. NEWCOMB'S WILDFLOWER GUIDE. Little, Brown and Co., Boston, MA.

Niehaus, T.F., and C.L. Ripper. 1976. A FIELD GUIDE TO PACIFIC STATES WILDFLOWERS. Houghton-Mifflin Company, Boston, MA. 432 pp.

Niehaus, T.F., J. Jousey, and J. McLean. 1984. A FIELD GUIDE TO SOUTHWESTERN AND TEXAS WILDFLOWERS. Houghton-Mifffin Company, Boston, MA. 449 pp.

Niering, W.A. 1984. WETLANDS. Alfred A. Knopf, Inc., New York, NY.

Niering, W.A. and W.C. Olmstead. 1979. THE AUDUBON SOCIETY FIELD GUIDE TO NORTH AMERICAN WILDFLOWERS: EASTERN REGION. Alfred A. Knopf, Inc., New York, NY.

Nixon, S.W. 1982. THE ECOLOGY OF NEW ENGLAND HIGH SALT MARSHES: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81/55.70 pp.

Norton, J.B.S., and R.G. Brown. 1946. A CATALOG OF THE VASCULAR PLANTS OF MARYLAND. University of Maryland Agricultural Experiment Station, College Park, MD.

Novitzki, R.P. 1979. AN INTRODUCTION TO WISCONSIN WETLANDS: PLANTS, HYDROLOGY, AND SOILS. US Geological Survey in cooperation with the University of Wisconsin. 19 pp.

Odum, W.E., C.C. McIvor, and T.J. Smith 111. 1982. THE ECOLOGY OF THE MANGROVES OF SOUTH FLORIDA: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81.24.

Odum, W.E., T.J. Smith III, J.K. Hoover, and C.C. McIvor. 1984. THE ECOLOGY OF TIDAL FRESHWATER MARSHES OF THE UNITED STATES EAST COAST: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-83/17. 176 pp.

Office of Technology Assessment 1984. WETLANDS: THEIR USE AND REGULATION. US Congress, Washington, DC.

Oklahoma State Department of Agriculture (Forestry Division). 1981. FOREST TREES OF OKLAHOMA: HOW TO KNOW THEM. Revised by E.L. Little, Jr. Oklahoma City, OK. Publ. No. 1, Rev. Ed. No. 12. 204 pp.

Omhart, R.D., B.W. Anderson, and W.C. Hunter. 1988. THE ECOLOGY OF THE LOWER COLORADO RIVER FROM DAVIS DAM TO THE MEXICO-UNITED STATES BOUNDARY: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.19). 296 pp.

Otto, N.E. 1980. AQUATIC PESTS ON IRRIGATION SYSTEMS, IDENTIFICATION GUIDE. (2nd. ed.). Department of the Interior, Water and Power Resources Service, Denver, CO. 90 pp.

Palmisano, A.W., and R.H. Chabreck. 1972. THE RELATIONSHIP OF PLANT COMMUNITIES AND SOILS OF THE LOUISIANA COASTAL MARSHES. Proceedings of the Louisiana Assoc. of Agronomists.

Peattie, D.C. 1930. FLORA OF THE INDIANA DUNES. Field Museum of Natural History, Chicago, IL. 405 pp.

Penfound, W.T. 1952. SOUTHERN SWAMPS AND MARSHES. Bot. Rev. 18(6):413-446.

Peters, D. D. 2005. Wetlands of Nevada (Draft). Portland, OR: U.S. Fish and Wildlife Service.

Petersen, N.F. 1912. FLORA OF NEBRASKA. (2nd. edition). N.F. Petersen, Plainview, NE. 217 pp.

Peterson, R.T. and M. McKenny. 1968. A FIELD GUIDE TO WILDFLOWERS OF NORTHEASTERN AND NORTH CENTRAL NORTH AMERICA. Houghton Mifflin Co., Boston, MA.

Petrides, G.A. 1958. A FIELD GUIDE TO THE TREES AND SHRUBS. Houghton Mifflin Co., Boston, MA.

Pohl, R.W. 1966. THE GRASSES OF IOWA. Iowa State Journal of Science 40(4):341-566. Iowa State University Press, Ames, IA.

Ponnamperuma, F.N. 1972. THE CHEMISTRY OF SUBMERGED SOILS. Advances in Agronomy 24: 29-96.

Prescott, G.W. 1969. HOW TO KNOW THE AQUATIC PLANTS. Brown Co., Dubuque, IA. 171 pp.

Preston, J. 1976. NORTH AMERICAN TREES. The Iowa State University Press, Ames, IA. 399 pp.

Preston, R.J., and V.G. Wright. 1982. IDENTIFICATION OF SOUTHEASTERN TREES IN WINTER. North Carolina Agricultural Extension Service, Raleigh, NC. 113 pp.

Proctor, C.M., et al. 1980. ECOLOGICAL CHARACTERIZATION OF THE PACIFIC NORTHWEST COAST REGION. 5 Vols. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-79/1 1. Vol. 1-224 pp.; Vol. 2-574 pp.; Vol 3-327 pp.; Vol. 4-551 pp.; Vol 5-70 pp.

Putnam, J.A., and H. Bull. 1932. THE TREES OF THE BOTTOMLANDS OF THE MISSISSIPPI RIVER DELTA REGION. USDA, Forest Service, Southern Forest Experiment Station, New Orleans, LA. Occasional Paper No. 27. 207 pp.

Radford, A.E., H.E. Ahles, and C.R. Bell. 1968. MANUAL OF THE VASCULAR FLORA OF THE CAROLINAS. University of North Carolina Press, Chapel Hill, NC.

Reed, C. 1953. THE FERNS AND FERN ALLIES OF MARYLAND AND DELAWARE, INCLUDING DISTRICT OF COLUMBIA. Reed Herbarium, Baltimore, MD.

Reed, P.B., Jr. 1988. NATIONAL LIST OF PLANT SPECIES THAT OCCUR IN WETLANDS: NATIONAL SUMMARY. U.S. Fish and Wildlife Service, Washington, DC. Biol. Rpt. 88(24). 244 pp. http://www.nwi.fws.gov/plants.htm

Reid, I., and L. E. Frostick. 1997. Channel form, flow, and sediments in deserts. In: Arid Zone Geomorphology: Process, Form and Change in Drylands, 2nd ed. ed. D.S.G. Thomas, 205–229. Chichester, UK: John Wiley and Sons.

Richards, L.A.. 1954. DIAGNOSIS AND IMPROVEMENT OF SALINE AND ALKALI SOILS. United States Department of Agriculture, Washington, DC. Agriculture Handbook No. 60. 196 pp. Reprinted Aug., 1969.

Richardson, J.L., and M.J. Vepraskas (eds.). 2000.Wetland soils: their genesis, morphology, hydrology, landscapes and classification. CRC Press, Boca Raton, FL.

Rickett, H.W. 1979. WILD FLOWERS OF THE UNITED STATES. VOLUMES I-VI PLUS INDEX. The New York Botanical Garden, McGraw-Hill Book Company, New York, NY. Vol. 1-559 pp., Vol Il688 pp., Vol 111-553 pp, Vol IV-801 pp, Vol V-666 pp, Vol VI-784 pp, Index- 152 pp.

Robinson, T.W. 1958. PHREATOPHYTES. USDI, Geological Survey, Washington, DC. Water Supply Paper No. 1423. 84 pp.

Rock, J.F. 1974. THE INDIGENOUS TREES OF THE HAWAIIAN ISLANDS. Pacific Tropical Botanical Garden, Lawai, Kauai, HA. 548 pp.

Rotar, P.P. 1968. GRASSES OF HAWAII. University of Hawaii Press, Honolulu, HA. 355 pp.

Rowell, C.M. 197 1. VASCULAR PLANTS OF PLAYA LAKES OF THE TEXAS PANHANDLE AND SOUTH PLAINS. Southwestern Naturalist 15(4):407-417.

Rydberg, P.A. 1965. FLORA OF THE PRAIRIES AND PLAINS OF CENTRAL NORTH AMERICA. Hafner Publishing Company, New York, NY. Facsimile of the Edition of 1932. 969 pp.

Rydberg, P.A. 1969. FLORA OF THE ROCKY MOUNTAINS AND ADJACENT PLAINS. Hafner Publishing Company, New York, NY. 1143 pp.

Sargent, C.S. 1965. TREES OF NORTH AMERICA. Dover Publications, New York, NY. (Two Vols.).

Schlosser, D.W. 1986. A FIELD GUIDE TO VALUABLE UNDERWATER AQUATIC PLANTS OF THE GREAT LAKES. Michigan State University, East Lansing, MI. 32 pp.

Schomer, N.S., and R.D. Drew. 1982. AN ECOLOGICAL CHARACTERIZATION OF THE LOWER EVERGLADES, FLORIDA BAY, AND THE FLORIDA KEYS. US Fish and Wildlife Service, Washing ton, DC. Publ. No. FWS/OBS-82/58.1. 263 pp.

Schomer, N.S., and R.D. Drew. 1982. AN ECOLOGICAL CHARACTERIZATION OF THE CALOOSAHAT-CHEE RIVER/BIG CYPRESS WATERSHED. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82/58.2. 225 pp.

Scoggan, H.J. 1978. THE FLORA OF CANADA. National Museum of Natural Sciences Publications in Botany, National Museums of Canada, Ottawa, Canada. Publ. No. 7. 1711 pp.

Seliskar, D.M. and J.L. Gallagher. 1983. THE ECOLOGY OF TIDAL MARSHES OF THE PACIFIC NORTHWEST COAST: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82/32. 65 pp.

Seymour, F.C. 1969. THE FLORA OF VERMONT. Agricultural Experiment Station, University of Vermont, Burlington, VT. Bulletin No. 660. 393 pp.

Sharitz, R.R. and J.W. Gibbons. 1982. THE ECOLOGY OF SOUTHEASTERN SHRUB BOGS (POCOSINS) AND CAROLINA BAYS: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-82/04.93 pp.

Shreve, F., and IL. Wiggins. 1964. VEGETATION AND FLORA OF THE SONORAN DESERT, VOLUME 1 AND VOLUME 2. Stanford University Press, Stanford, CA. Vol. 1-840 pp,

Silberhorn, G.M. 1976. TIDAL WETLAND PLANTS OF VIRGINIA. Virginia Institute of Marine Sciences, Gloucester Point, VA. Educational Series No. 19. 86 pp.

Simenstad, C.A. 1983. THE ECOLOGY OF ESTUARINE CHANNELS OF THE PACIFIC NORTHWEST COAST: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-83/05.181 pp.

Sipple, W.S. 1987. WETLAND IDENTIFICATION AND DELINEATION MANUAL. VOLUME I. RATIONALE, WETLAND PARAMETERS, AND OVERVIEW OF JURISDICTIONAL APPROACH. U.S. Environmental Protection Agency, Office of Wetlands Protection, Washington, DC. 28 pp. plus appendices.

Sipple, W.S. 1987. WETLAND IDENTIFICATION AND DELINEATION MANUAL. VOLUME II. FIELD METHODOLOGY. U.S. Environmental Protection Agency, Office of Wetlands Protection, Washington, DC. 29 pp. plus appendices.

Small, J .K. 1918. FERNS OF TROPICAL FLORIDA. Published by the Author, NY. 82 pp.

Small, J.K. 1933. MANUAL OF THE SOUTHEASTERN FLORA. The University of North Carolina Press, Chapel Hill, NC.

Smeins, F.E. 1967. THE WETLAND VEGETATION OF THE RED RIVER VALLEY AND DRIFT PRAIRIE REGIONS OF MINNESOTA, NORTH DAKOTA, AND MANITOBA. Ph.D. Dissertation. University of Saskatchewan, CN. 226 pp.

Smith, E.B. 1978. AN ATLAS AND ANNOTATED LIST OF THE VASCULAR PLANTS OF ARKANSAS. University of Arkansas at Fayetteville, Fayetteville, AR. 562 pp.

Smith, E.C., and L.W. Durrell. 1944. SEDGES AND RUSHES OF COLORADO. Colorado Agricultural Experiment Station, Colorado State University, Ft. Collins, CO. Tech. Bull. 32. 63 pp.

Smith, H.V. 1966. MICHIGAN WILDFLOWERS. Cranbrook Institute of Science, The Cranbrook Press, Bloomfield Hills, MI. Bulletin 42 (Revised).

Soil Conservation Service. 1972. NATIVE FLOWERS OF TEXAS. USDA, Temple, TX.

Soil Science Society of America. 1987. Glossary of Soil Science Terms. Soil Science Society of America, Madison, WI.

Soil Science Society of America. 1993. Proceedings of the Symposium on Soil Color, October 21–26, 1990. San Antonio, TX. J.M. Bigham and E.J. Ciolkosz (eds.), Special Publ. #31, Soil Science Society of America, Madison, WI.

Sprecher, S. W., and A. G. Warne. 2000. Accessing and using meteorological data to evaluate wetland hydrology. Technical Report ERDC/EL TR-WRAP-00-1. Vicksburg, MS: U.S. Army Engineer Research and Development Center. (http://el.erdc.usace.army.mil/elpubs/pdf/wrap00-1/wrap00-1.pdf)

St. John, H. 1963. FLORA OF SOUTHWEST WASHINGTON. Outdoor Pictures, Escondido, CA. 583 pp.

St. John, H. 1973. LIST AND SUMMARY OF FLOWERING PLANTS IN THE HAWAIIAN ISLANDS. Pacific Tropical Botanical Garden, Memoir No. 1, Lawai, Kauai, Hawaii. 519 pp.

Stemmermann, L. 198 1. A GUIDE TO PACIFIC WETLAND PLANTS. US Army Corps of Engineers.,

Stephens, H.A. 1969. TREES, SHRUBS, AND WOODY VINES IN KANSAS. Regents Press of Kansas, Lawrence, KS. 250 pp.

Stephens, H.A. 1973. WOODY PLANTS OF THE NORTH CENTRAL PLAINS. University Press of Kansas, Lawrence, KS. 530 pp.

Stevens, O.A. 1963. HANDBOOK OF NORTH DAKOTA PLANTS. North Dakota Institute for Regional Studies, Fargo, ND. 324 pp.

Stevenson, G.B. 1969. TREES OF EVERGLADES NATIONAL PARK AND THE FLORIDA KEYS. Everglades Natural History Association, FL. 32 pp.

Stewart, A.N., L.J. Dennis, and H.M. Gilkey. 1963. AQUATIC PLANTS OF THE PACIFIC NORTHWEST. Oregon State University Press, Corvallis, OR. 261 pp.

Steyermark, J.A. 1963. FLORA OF MISSOURI. The Iowa State University Press, Ames, IA.

Stone, R. O. 1956. A geological investigation of playa lakes. Ph.D. dissertation. Los Angeles, CA: University of Southern California.

Stout, J.P. 1984. THE ECOLOGY OF IRREGULARLY FLOODED SALT MARSHES OF THE NORTHEASTERN GULF OF MEXICO: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.1). 98 pp.

Strausbaugh, P.D. and E.L. Core. 1977. FLORA OF WEST VIRGINIA. 4 Vols. West Virginia University Books, Morgantown, WV. Bulletin, Series 70: 7-2. 1079 pp.

Swink, F., and G. Wilhelm. 1979. PLANTS OF THE CHICAGO REGION. The Morton Arboretum, Lisle, IL. 922 pp.

Tarver, D.P., J.A. Rodgers, M.J. Mahler, R.L. Lazor. 1978. AQUATIC AND WETLAND PLANTS OF FLORIDA. Bureau of Aquatic Plant Research and Control, Florida Department of Natural Resources, Tallahassee, FL. 127 pp.

Tatnall, R.R. 1946. FLORA OF DELAWARE AND THE EASTERN SHORE. Society of Natural History of Delaware, Intelligencer Printing Company, Lancaster, PA. 291 pp.

Taylor, J. 1977. A CATALOG OF VASCULAR AQUATIC AND WETLAND PLANTS THAT GROW IN OKLAHOMA. Southeastern Oklahoma State University Herbarium, Durant, OK. Pub. No. 1. 75 pp.

Teal, J.M. 1985. THE ECOLOGY OF REGULARLY FLOODED SALT MARSHES OF NEW ENG LAND. US Fish and Wildlife Service, Washington, DC. Publ. No. 85(7.4). 61 pp.

Tharp, B.C. 1952. TEXAS RANGE GRASSES. University of Texas Press, Austin, TX. 125 pp.

Thomas, J.H., and D.R. Parnell. 1974. NATIVE SHRUBS OF THE SIERRA NEVADA. University of California Press, Berkeley, CA. 127 pp.

Thomson, O.S. 1976. SPRING FLORA OF WISCONSIN. University of Wisconsin Press, Madison, WI. 413 pp.

Thorne, R.F. 1954. THE VASCULAR PLANTS OF SOUTHWESTERN GEORGIA. American Midland Naturalist 52(2): 257-327.

Tidestrom, 1. 1969. FLORA OF UTAH AND NEVADA. Reprints of US-Floras, Volume 3, Velag Von 1. Cramer, S-H Service Agency, Inc., New York, NY. 665 pp.

Tiner, R. W. (1999). Wetland indicators: A guide to wetland identification, delineation, classification, and mapping. Lewis Publishers, Boca Raton, FL.

Tiner, R.W. Jr. 1985. WETLANDS OF NEW JERSEY. U.S. Fish and Wildlife Service, Newton Corner, MA. 117 pp.

Tiner, R.W., Jr. 1985. WETLANDS OF DELAWARE. U.S. Fish and Wildlife Service, Newton Comer, MA and Delaware Department of Natural Resources and Environmental Control, Dover, DE. Cooperative Publication. 77 pp.

Tiner, R.W. Jr. 1987. A FIELD GUIDE TO COASTAL WETLAND PLANTS OF THE NORTHEASTERN UNITED STATES. University of Massachusetts Press, Amherst, MA. 285 pp.

Tiner, R.W. Jr. 1988. FIELD GUIDE TO NONTIDAL WETLAND IDENTIFICATION. Maryland Department of Natural Resources, Annapolis, MD and US Fish and Wildlife Service, Newton Comer, MA. 283 pp. plus 198 color plates.

Tiner, R.W. Jr. and P.L.M. Veneman. 1987. HYDRIC SOILS OF NEW ENGLAND. University of Massachusetts Cooperative Extension, Amherst, MA. Bulletin C-183.

Trelease, W. 1931. WINTER BOTANY. Dover Publications, New York, NY.

U. S. Army Corps of Engineers. (2005). Technical Standard for Water-Table Monitoring of Potential Wetland Sites, WRAP Technical Notes Collection (ERDC TN-WRAP-05-2), U. S. Army Engineer Research and Development Center, Vicksburg, MS. (http://el.erdc.usace.army.mil/wrap/pdf/tnwrap05-2.pdf)

U.S. Army Corps of Engineers. 2005. Interim Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys and Coast Region. ed. J. S. Wakeley, R. W. Lichvar, and C. V. Noble. In preparation. Vicksburg, MS: U.S. Army Engineer Research and Development Center.

U.S. Army Engineer Research and Development Center, Cold Regions Research and Engineering Laboratory. (http://www.crrel.usace.army.mil/techpub/CRREL_Reports/reports/ERDC-TR-04-1.pdf)

U.S.D.A. Soil- Conservation Service. 1982. NATIONAL LIST OF SCIENTIFIC PLANT NAMES. VOL. 1. LIST OF PLANT NAMES. VOL. 2. SYNONYMY. Washington, DC.

United States Department of Agriculture, Natural Resources Conservation Service. 1998a. Fieldbook for describing and sampling soils. Compiled by P.J. Schoeneberger, D.A. Wysocki, E.C.Benham, and W.D. Broderson. National Soil Survey Center, Lincoln, NE.

United States Department of Agriculture, Natural Resources Conservation Service. 1998b. Field indicators of hydric soils in the United States,Ver. 4.0. G.W. Hurt, P.M. Whited, and R.F. Pringle (eds.).

United States Department of Agriculture, Natural Resources Conservation Service. 1996. Field indicators of hydric soils in the United States, Ver. 3.2. G.W. Hurt, P.M. Whited, and R.F. Pringle (eds.).

United States Department of Agriculture, Natural Resources Conservation Service. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. U.S.Dep. Agric. Handb. 436,Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1975. SOIL TAXONOMY. A BASIC SYSTEM OF SOIL CLASSIFICATION FOR MAKING AND INTERPRETING SOIL SURVEYS. U.S. Government Printing Office, Washington, DC. Agriculture Handbook No. 436.754 pp.

United States Department of Agriculture, Soil Conservation Service. 1981. Land resource Regions and major land resource areas of the United States. Agric. Handb. 296. US Govt. Printing Off., Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1982. HYDRIC SOILS OF THE UNITED STATES. Washington, DC. National Bulletin No. 430-2-7.

United States Department of Agriculture, Soil Conservation Service. 1983. NATIONAL SOILS HANDBOOK. Department of Agriculture, Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1984. SOIL SURVEY MANUAL. Department of Agriculture, Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1987. HYDRIC SOILS OF THE UNITED STATES. 1987. In cooperation with the National Technical Committee for Hydric Soils. United States Department of Agriculture-SCS, Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1991. Hydric soils of the United States. Soil Conservation Service in cooperation with the National Technical Committee for Hydric Soils, Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1992. Soil and Water Relationships of Florida’s Ecological Communities. G.W. Hurt (ed.). Florida Soil Survey Staff, Gainesville, FL.

United States Department of Agriculture, Soil Conservation Service. 1993. National Soil Survey Handbook. Washington, DC.

United States Department of Agriculture, Soil Conservation Service. 1993. Soil Survey Manual. U.S. Dep. Agric. Handbook No. 18. Washington, DC. 502 pp.

US Army Corps of Engineers. 1977. WETLAND PLANTS OF THE EASTERN UNITED STATES. North Atlantic Corps of Engineers Division, New York, NY. Publ. No. 200- 1 - 1. (http://www.nao.usace.army. mil/business%20resource/Information%20Management/Library/Wetlands/cover.htm)

US Army Corps of Engineers. 1978. PRELIMINARY GUIDE TO WETLANDS OF THE GULF COASTAL PLAIN. US Army Engineer Waterways Experiment Station, Vicksburg, MS. Technical Report Y-78-5.

US Army Corps of Engineers. 1979. SUPPLEMENT TO WETLAND PLANTS OF THE EASTERN UNITED STATES. North Atlantic Division, New York, NY. NADP-200-1-1, Suppl. 1.

US Army Corps of Engineers. 1988. A GUIDE TO SELECTED FLORIDA WETLAND PLANTS AND COMMUNITIES. Jacksonville District, Jacksonville, FL. Publ. No. CESAOP 7745-2-1. 319 pp.

US Army Corps of Engineers. Undated. COMMON WETLAND PLANTS OF SOUTHWEST TEXAS. Galveston Corps of Engineers District, Galveston, TX.

USDA Natural Resources Conservation Service. (1997). Hydrology tools for wetland determination, Chapter 19, Engineering field handbook, U. S. Department of Agriculture, NRCS, Fort Worth, TX.

USDA Natural Resources Conservation Service. (1999). Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. Agricultural Handbook 436, Washington, DC.

USDA Natural Resources Conservation Service. (2002). Field book for describing and sampling soils, Version 2.0. P. J. Schoeneberger, D. A.Wysocki, E. C. Benham, and W. D. Broderson (eds.). National Soil Survey

USDA Natural Resources Conservation Service. (2004). Land resource regions and major land resource areas of Alaska. Palmer, AK. (ftp://ftpfc.sc.egov.usda.gov/AK/lrr.pdf)

USDA Natural Resources Conservation Service. (2005a). Field indicators of hydric soils in Alaska: A user guide. Palmer, AK. (ftp://ftpfc.sc.egov.usda.gov/AK/AKFieldIndicators.pdf).

USDA Natural Resources Conservation Service. (2005b). National Soil Survey Handbook, Title 430-VI. [Online] (http://soils.usda.gov/technical/handbook/).

USDA Natural Resources Conservation Service. 1997. Hydrology tools for wetland determination. Chapter 19 In Engineering Field Handbook. Fort Worth, TX: U.S. Department of Agriculture, NRCS. (http://www.info.usda.gov/CED/ftp/CED/EFHCh19. pdf)

USDA Natural Resources Conservation Service. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. Agricultural Handbook 436, Washington, DC. (http://soils.usda.gov/technical/classification/taxonomy/)

USDA Natural Resources Conservation Service. 2002. Field book for describing and sampling soils, Version 2.0. ed. P. J. Schoeneberger, D. A. Wysocki, E. C. Benham, and W. D. Broderson. Lincoln, NE: National Soil Survey Center. (http://soils.usda.gov/technical/fieldbook/)

USDA Natural Resources Conservation Service. 2005. National soil survey handbook, Part 629, Glossary. Washington, DC: U.S. Department of Agriculture. (http://soils.usda.gov/technical/handbook/contents/part629glossary1.html)

USDA Natural Resources Conservation Service. 2006a. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. Agriculture Handbook 296. Washington, DC: U.S. Department of Agriculture. (http://soils.usda.gov/survey/geography/mlra/index.html)

USDA Natural Resources Conservation Service. 2006b. Field indicators of hydric soils in the United States, Version 6.0. ed. G. W. Hurt and L. M. Vasilas. Fort Worth, TX: USDA NRCS in cooperation with the National Technical Committee for Hydric Soils. (http://soils.usda.gov/use/hydric/)

USDA Soil Conservation Service. 1994. Changes in hydric soils of the United States. Federal Register 59(133): 35680–35681, July 13, 1994.

USDA. 1970. MANUAL OF THE CARICES OF THE ROCKY MOUNTAINS AND COLORADO BA- SIN. Agric. Handbook No. 374. Washington, DC.

U.S. Geological Survey. 1996. National water summary on wetland resources. Reston, VA.

Van Bruggen, T. 1983. WILDFLOWERS, GRASSES AND OTHER PLANTS OF THE NORTHERN GREAT PLAINS AND BLACK HILLS. University of South Dakota, Vermillion, SD. 96 pp.

Van Bruggen, T. 1985. THE VASCULAR PLANTS OF SOUTH DAKOTA (2ND ED.). Iowa State University Press, Ames, IA. 476 pp.

Vance, F., J. Jousey, and J. McLean. 1984. WILDFLOWERS OF THE NORTHERN GREAT PLAINS. University of Minnesota Press, Minneapolis, MN. 336 pp.

Veneman, P.L.M., M.J. Vepraskas, and J. Bourna. 1976. THE PHYSICAL SIGNIFICANCE OF SOIL MOTTLING IN A WISCONSIN TOPOSEQUENCE. Geoderma 15:103-118.

Vepraskas, M. J. 1995. Redoximorphic features for identifying aquic conditions. Technical Bulletin 301. Raleigh, NC: North Carolina Agricultural Research Service, North Carolina State Univ.

Vepraskas, M. J., and S. W. Sprecher. 1997. Aquic conditions and hydric soils: The problem soils. Special Publication Number 50. Madison, WI: Soil Science Society of America.

Viereck, L. A., Van Cleve, K., and Dyrness, C. T.. (1986). Forest ecosystem distribution in the taiga environment. Forest ecosystems in the Alaska Taiga: A synthesis of structure and function. Chapter 3 in K. Van Cleve, F. S. Chapin, III, P. W. Flanagan, L. A. Viereck, and C. T. Dyrness, eds. Springer Verlag, New York, 22-43.

Vines, R.A. 1976. TREES, SHRUBS, AND WOODY VINES OF THE SOUTHWEST. University of Texas Press, Austin, TX. 1104 pp.

Volland, L.A. 1982. PLANT ASSOCIATIONS OF THE CENTRAL OREGON PUMICE ZONE. USDA, Forest Service, Portland, OR. Publ. No. R6-ECOL-104-1982.

Voss, E. 1972. MICHIGAN FLORA. PART I. GYMNOSPERMS AND MONOCOTYLEDONS. Cranbrook Institute of Science, Bloomfield Hills, MI. 488 pp.

Voss, E. 1985. MICHIGAN FLORA. PART Il. DICOTYLEDONS. Cranbrook Institute of Science, Bloomfield Hills, MI. 724 pp.

Wagner, W.L., and E.F. Aldon. 1978. MANUAL OF THE SALTBUSHES (ATRIPLEX SPP.) IN NEW MEXICO. USDA, Forest Service, Rocky Mountain Forest and Range Experiment Station, Ft. Collins, CO. General Technical Report RM-57. 50 pp.

Wakeley, J. S., and R. W. Lichvar. 1997. Disagreement between plot-based prevalence indices and dominance ratios in evaluations of wetland vegetation. Wetlands 17:301–309.

Warnock, B.H. 1970. WILDFLOWERS OF THE BIG BEND COUNTRY, TEXAS. Sul Ross State University, Alpine, TX. 156 pp.

Warnock, B.H. 1974. WILDFLOWERS OF THE GUADALUPE MOUNTAINS AND THE SAND DUNE COUNTRY, Texas. Sul Ross State University, Alpine, TX.

Warnock, B.H. 1977. WILDFLOWERS OF THE DAVIS MOUNTAINS AND MARATHON BASIN, TEXAS. Sul Ross State University, Alpine, TX. 274 pp.

Waterfall, U.T. 1979. KEYS TO THE FLORA OF OKLAHOMA. Oklahoma State University, Stillwater, OK. 246 pp.

Weber, W.A. 1987. COLORADO FLORA: WESTERN SLOPE. Colorado Associated University Press, Boulder, CO. 530 pp.

Weinmann, F., M. Boule, K. Brunner, J. Malek, and V. Yoshino. 1984. WETLAND PLANTS OF THE PACIFIC NORTHWEST. US Army Corps of Engineers, Seattle District, Seattle, WA. 85 pp.

Weishaupt, C.G. 1960. VASCULAR PLANTS OF OHIO. Ohio State University Press, Columbus, OH. 307 pp.

Welsh, S.L. 1973. UTAH PLANTS. Brigham Young University Press, Provo, UT. 474 pp.

Welsh, S.L. 1974. ANDERSON'S FLORA OF ALASKA AND ADJACENT PARTS OF CANADA. Brigham Young University Press, UT. 724 pp.

Wentworth, T. R., G. P. Johnson, and R. L. Kologiski. 1988. Designation of wetlands by weighted averages of vegetation data: A preliminary evaluation. Water Resources Bulletin 24: 389–396.

West, E., and L.E. Arnold. 1950. THE NATIVES TREES OF FLORIDA. Fourth Printing. University of Florida Press, Gainesville, FL. 212 pp.

Wharton, C.H., W.M. Kitchens, E.C. Pendleton, and T.W. Sipe. 1982. THE ECOLOGY OF BOTTOMLAND HARDWOOD SWAMPS OF THE SOUTHEAST: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81/37.

Wharton, M.E., and R.W. Barbour. 1971. A GUIDE TO THE WILDFLOWERS AND FERNS OF KENTUCKY. University Press of Kentucky, Lexington, KY. 344 pp.

Wherry, E.T. 1964. THE SOUTHERN FERN GUIDE. Doubleday and Company, Inc., Garden City, NY. 349 pp.

White, H.A. 1974. ALASKA-YUKON WILDFLOWERS GUIDE. Alaska-Northwest Publishing Company, Anchorage, AK. 21.8 pp.

Whitlatch, R.B. 1982. THE ECOLOGY OF NEW ENGLAND TIDAL FLATS: A COMMUNITY PR& FILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81/01. 217 PP.

Wiedemann, A.M. 1984. THE ECOLOGY OF PACIFIC NORTHWEST COASTAL SAND DUNES: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-84/04. 1984.

Wiedemann, A.M., L.J. Dennis, and F.H. Smith. 1974. PLANTS OF THE OREGON COASTAL DUNES. Oregon State University, Corvallis, OR. 117 pp.

Wiegand, K.M., and A.J. Eames. 1926. THE FLORA OF THE CAYUGA LAKE BASIN, NEW YORK. Cornell University Agricultural Experiment Station, Cornell University Press, Ithaca, NY. Memoir No. 92. 491 pp.

Wiggins, I.L., and J.H. Thomas. 1962. A FLORA OF THE ALASKAN ARCTIC SLOPE. Arctic Institute of North America, University of Toronto Press,: Toronto, Canada. Spec. Publ. No. 4. 425 pp.

Williams, C.K., and T.R. Lillybridge. 1983. FORESTED PLANT ASSOCIATIONS OF THE OKANOGAN NATIONAL FOREST. USDA, Forest Service, Portland, OR. Publ. No. R6-ECOL- 132-1983. 116 pp.

Williams, C.K., and T.R. Lillybridge. 1985. FORESTED PLANT ASSOCIATIONS OF THE COLVILLE NATIONAL FOREST. (Draft). USDA, Forest Service. 96 pp.

Williams, P. J., and M. W. Smith. (1989). The frozen earth: Fundamentals of geocryology. Cambridge University Press.

Windell, J.T., B.E. Willard, D.J. Cooper, S.Q. Foster, C.F. Knud-hansen, L.P. Rink, and G.M. Kiladis. 1986. AN ECOLOGICAL CHARACTERIZATION OF ROCKY MOUNTAIN MONTANE AND SUBALPINE WETLANDS. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.19). 298 pp.

Winterringer, G.S., and A.C. Lopinot. 1977. AQUATIC PLANTS OF ILLINOIS. Department of Registration and Education, Illinois State Museum Division and Department of Conservation, Division of Fisheries, Illinois State Museum, Springfield, IL. 142 pp.

Wolf, R.B., L.C.Lee, and R.R. Sharitz. 1986. WETLAND CREATION AND RESTORATION IN THE UNITED STATES FROM 1970 TO 1985: AN ANNOTATED BIBLIOGRAPHY. SPECIAL ISSUE. Wetlands 6(l):1-87.

Wolfe, S.H., and D.B. Menas. 1988. AN ECOLOGICAL CHARACTERIZATION OF THE FLORIDA PANHANDLE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 99(12).277 pp.

Wooton, E.O., and P.C. Standley. 1972. FLORA OF NEW MEXICO. Reprints of U.S. - Floras, Vol. 7. Stechert-Hafner Service Agency, Inc., New York, NY. 794 pp.

Wunderlin, R.P. 1982. GUIDE TO THE VASCULAR PLANTS OF CENTRAL FLORIDA. A University of South Florida Book, University Presses of Florida, Tampa. FL. 472 pp.

Zedler, J.B. 1982. THE ECOLOGY OF SOUTHERN CALIFORNIA COASTAL SALT MARSHES: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Publ. No. FWS/OBS-81/54. 110 pp.

Zedler, P.H. 1987. THE ECOLOGY OF SOUTHERN CALIFORNIA VERNAL POOLS: A COMMUNITY PROFILE. US Fish and Wildlife Service, Washington, DC. Biol. Rpt. 85(7.11). 136 pp.