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| Vascular Plants of Ohio: A Manual for Use in Field and Laboratory | Weishaupt, C.G. | Natural History |
| Vascular Plants of San Luis Obispo County, California | Hoover, R. F. | Plant Identification |
| Vascular Plants of South Dakota | Van Bruggen, T. | Plant Identification |
| Vascular Plants of Texas | Jones, Wipff, and Montgomery | Plant Identification |
| Vascular Plants of the Pacific Northwest | Hitchcock, C.L., et al. | Plant Identification |
| Vascular Plants of Unglaciated Ohio | Cusick, A.W. & G.M. Silberhorn | Plant Identification |
| Vascular plants of Wyoming (Third Edition) | Dorn, R. D. | Plant Identification |
| Vegetation of the New Jersey Pine-Barrens | Harshberger, J.W. | Plant Identification
Natural History |
| Vegetation of Wisconsin | Curtis, J. T. | Plant Identification
Natural History |
| Vermont Nature Guide: A field guide to birds, mammals, trees, insects, wildflowers, amphibians, reptiles, and where to find them | Amsel, S. | Wildlife |
| Vermont Trees & Wildflowers: An Introduction to Familiar Species (A Pocket Naturalist Guide) | Kavanagh, J. M. | Wildlife |
| Violets of North America | Brainerd, Ezra | Plant Identification |
| Volume 1: Plains & Foothills (Guide to Colorado Wildflowers) | Guennel, G. K. | Wildflowers |
| Walking the Wetlands: A Hiker's Guide to Common Plants and Animals of Marshes, Bogs, and Swamps | Lyons, J.; S. Jordan;Schneider, R. | Natural History
Plant Identification
Wildlife |
| Walking with wildflowers : a field guide to the St. Louis area | Haller, K.S. | Wildflowers |
| Washington State Trees & Wildflowers: An Introduction to Familiar Species (State Nature Guides) [Pamphlet] | Kavanagh, J. | Plant Identification
Wildflowers |
| Watching Nature: A Mid-Atlantic Natural History | Garland, M. S. | Natural History |
| Water Conserving Plants & Landscapes for the Bay Area | Coate, B. D. | Landscaping |
| Water Wise: Native Plants for Intermountain Landscapes | Mee, W. | Landscaping |
| Waterwise Plants for Sustainable Gardens: 200 Drought-Tolerant Choices for all Climates | Ogden, L. S. and Ogden, S. | Gardening |
| Ways With Wild Flowers: A Guide to Native Plant Communities | | Wildflowers |
| Wayside Wildflowers of the Pacific Northwest | Strickler, D. | Wildflowers
Plant Identification |
| Weaver's Garden : Growing Plants for Natural Dyes and Fibers | Buchanan, R. | Useful Plants
Gardening |
| Weeds and Poisonous Plants of Wyoming and Utah (Research Report, 116) (First Edition) | Whitsonm, T. D. | Poisonous Plants |
| Weeds in My Garden: Observations on Some Misunderstood Plants | Heiser, C. B. | Invasive Plants
Plant Identification
Useful Plants |
| Weeds in South Texas and Northern Mexico: A Guide to Identification | Everitt, J.H.; Lonard, R.I.; Little, C.R. | Invasive Plants |
| Weeds of Colorado | Zindahl, R. L. | Invasive Plants |
| Weeds of Nebraska and the Great Plains (2nd edition) | Stubbendieck, J. L. | Plant Identification |
| Weeds of the Great Plains | Stubbendieck, J. L.; M. J. Coffin; L. M. Landholt | Invasive Plants
Plant Identification |
| Weeds of the Midwestern United States and Central Canada | Bryson, C. and DeFelice, M.S. (Editors) | Plant Identification |
| Weeds of the Northeast | Uva, R.H., J.C. Neal & J. M. Ditomaso | Invasive Plants
Plant Identification |
| Weeds of the Northern U. S. and Canada: A Guide for Identification | Royer, F. & R. Dickinson | Invasive Plants
Plant Identification |
| Weeds of the South | Bryson, C. T.; DeFelice, M. S.; Evans, A. W. | Invasive Plants |
| Weeds of the West | Whitson, T. D.; L. C. Burrill | Plant Identification |
| Weeds: A Guide for Dyers and Herbalists | Bliss, A. | Useful Plants |
| Welcoming Wildlife to the Garden: Creating Backyard & Balcony Habitats for Wildlife | Johnson, C. J. ; S. McDiarmid; E. R. Turner | Gardening
Landscaping
Wildlife |
| West Virginia Trees & Wildflowers: An Introduction to Familiar Species (State Nature Guides) [Pamphlet] | Kavanagh, J. | Wildflowers |
| Western Forests (Audubon Society Nature Guides) | Whitney, S. | Plant Identification
Natural History
Wildlife |
| Western wetland flora : field office guide to plant species | U.S. Soil Conservation Service; West National Technical Center | Plant Identification |
| Wetland and Riparian Areas of the Intermountain West: Ecology and Management | M. C. McKinstry; W. A. Hubert; S. H. Anderson | Natural History |
| Wetland Planting Guide for the Northeastern United States: Plants for Wetland Creation, Restoration, and Enhancement | Thunhorst, G.A.; D. R. Biggs | Gardening
Landscaping |
| Wetland Plants of Indiana: A Complete Guide to the Wetland and Aquatic Plants of the Hoosier State | Chadde, S.W. | Plant Identification |
| Wetland Plants of Minnesota: A Complete Guide to the Wetland and Aquatic plants of the North Star State | Chadde, S. W. | Plant Identification |
| Wetland Plants of the Northern Great Plains: A complete guide to the wetland and aquatic plants of North and South Dakota, Nebraska, Eastern Montana and Eastern Wyoming | Chadde, S. W. | Plant Identification |
| Wetland Plants of Wisconsin: A Complete Guide to the Wetland and Aquatic Plants of the Badger State (Second Edition) | Chadde, S. W. | Plant Identification |
| What the River Reveals: Understanding and Restoring Healthy Watersheds | Rapp, V. | Natural History |
| What's Doin' the Bloomin'? Revised Edition:A Pictorial Guide to Wildflowers of the Upper Great Lakes Regions, Eastern Canada and Northeastern U. S. A. | Oslund, C.; M. Oslund | Wildflowers |
| Where The Sky Began : Land of the Tallgrass Prairie | Madson, J. | Natural History |
| Wicked Plants : The Weed That Killed Lincoln's Mother and Other Botanical Atrocities | Stewart, Amy | Invasive Plants
Poisonous Plants |
| Wild About Mushrooms: the Cookbook of the Mycological Society of San Francisco | Freeman, L. | Edible Plants |
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