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| Catalogue of the flora of Montana and the Yellowstone National Park Volume 1 | Rydberg, P. A. | Plant Identification |
| Caterpillars in the Field and Garden: A Field Guide to the Butterfly Caterpillars of North America | Allen, T.J. Brock J. P. Glassberg, J. | Wildlife |
| Caterpillars of Eastern North America: A Guide to Identification and Natural History | Wagner, D.L. | Wildlife |
| Central Appalachian Wildflowers | Medina, B. F.; V. Medina | Wildflowers |
| Central Rocky Mountain Wildflowers: Including Yellowstone and Grand Teton National Parks (Wildflower Series) (1st Edition) | Phillips, W. | Plant Identification Wildflowers |
| Changing Mile Revisited: An Ecological Study of Vegetation Change With Time in the Lower Mile of an Arid and Semiarid Region | Turner, R. M. | Natural History |
| Checklist of New York State Plants | Mitchell, R.S. | Plant Identification |
| Chesapeake Bay: Nature of the Estuary: A Field Guide | White, C. P.;Teramura, K. | Wildlife |
| Chestnuts, Galls, and Dandelion Wine: Useful Wild Plants of the Boston Harbor Islands | Perkins, W. D. | Edible Plants Useful Plants |
| Chilies to Chocolate: Food the Americas Gave the World | Foster, N. & L. S. Cordell (eds.) | Edible Plants |
| City Herbal: Lore, Legend, and Uses of Common Weeds | Silverman, M. | Edible Plants Medicinal Plants Useful Plants |
| Climbing Gardens: Adding Height and Structure to Your Garden | Clifton, J. | Gardening |
| Coastal Dune Plants: The Common Plants of Southeast Florida's Ocean-Side Communities | Austin, Daniel; Penelope Honychurch; Steve Bass | Natural History Plant Identification Useful Plants |
| Coastal Hammock and Mangrove Guide: A pocket guide to the common trees, shrubs, and vines of S.E. Florida's hammock and mangrove communities | Austin, Daniel; Penelope Honychurch; Steve Bass | Natural History Plant Identification |
| Coastal Lowland Wildflowers | Underhill, J. E.; D. Ottosen | Wildflowers |
| Coastal Plants from Cape Cod to Cape Canaveral | Stuckey, I.H., Gould, L.L. | Wildflowers |
| Coastal Wildflowers of the Pacific Northwest: Wildflowers and Flowering Shrubs from British Columbia to Northern California | Horn, E.L. | Wildflowers |
| Collecting, Processing, and Germinating Seeds of Wildland Plants | Young, J. & C. Young | Wildflowers Plant Propagation |
| Color Atlas of Plant Propagation and Conservation | Bowes, B. G. | Natural History Plant Propagation |
| Colorado Flora: Eastern Slope | Weber, W.A.; R. C. Wittmann | Plant Identification |
| Colorado Flora: Western Slope | Weber, W. A.; R. C. Wittmann | Plant Identification |
| Colorado Gardener's Guide | Crett, J. | Gardening |
| Colorado Trees & Wildflowers: An Introduction to Familiar Species (State Nature Guides) (First Edition) | Kavanagh, J. | Plant Identification |
| Common Coastal Plants in Florida: A Guide to Planting and Maintenance | Barnett, M.R. | Plant Identification |
| Common Edible & Useful Plants of the East & Midwest | Sweet, M. | Useful Plants Edible Plants |
| Common Edible and Useful Plants of the West | Sweet, M. | Edible Plants Useful Plants |
| Common flora of the playa lakes | Haukos, D.A. & L.M. Smith | Plant Identification Natural History |
| Common Flowering Plants of the Northeast: their natural history and uses | Cox, D. D. | Useful Plants Medicinal Plants Edible Plants |
| Common grasses & sedges in North Dakota | Dodds, D. L. | Plant Identification |
| Common Grasses of Florida and the Southeast | Yarlett, Lewis | Plant Identification |
| Common Legumes of the Great Plains (First Edition) | Conard, E. C. and Stubbendieck, J. | Plant Identification |
| Common Plants of the Mid-Atlantic Coast: A Field Guide | Silberhorn, G.M. | Plant Identification |
| Common Poisonous Plants and Mushrooms of North America. | Turner, N. J. & A. F. Szczawinski | Poisonous Plants |
| Common riparian plants of California :
a field guide for the layman | Faber, P. M.; R. F. Holland | Plant Identification |
| Common Southwestern Native Plants: An Identification Guide | Carter, J. L.; M. A. Carter; D. J. Stevens | Gardening Plant Identification |
| Common Texas Grasses: An Illustrated Guide | Gould, F. W. | Plant Identification |
| Common Wetland Plants of Coastal California: a field guide for the layman | Faber, P.M. | Plant Identification |
| Common Wild Flowers of Minnesota | Monserud, W.; G. B. Ownbey | Wildflowers |
| Community Forests of Mexico: Managing for Sustainable Landscapes | Bray, D. B.; L. Merino-Pérez; D. Barry | Landscaping Natural History Useful Plants |
| Complete Book of Herbs: A Practical Guide to Cultivating, Drying, and Cooking With More Than 50 Herbs | Callery, E. | Edible Plants Medicinal Plants |
| Complete Book of Plant Propagation | Clarke, G.; A. R. Toogood | Plant Propagation |
| Complete Garden Guide to Native Shrubs of California | Keator, G. | Gardening Plant Identification |
| Complete Garden Guide to the Native Perennials of California | Keator, G. | Gardening Plant Identification |
| Complete Guide to Florida Wildflowers: Over 600 Wildflowers of the Sunshine State including National Parks, Forests, Preserves and More than 160 State Parks (Wildflowers in the National Parks Series) | Hammer, R. L. | Natural History Plant Identification |
| Complete Outdoorsman's Guide to Edible Wild Plants | Berglund, B. & C. E. Bolsby | Edible Plants |
| Conducting Prescribed Fires: A Comprehensive Manual | John R. Weir | Landscaping Sustainable Landscaping Wildflowers Wildlife |
| Conifers for Gardens: An Illustrated Encyclopedia | Bitner, R. L. | Gardening |
| Conifers of California | Lanner, R.M. | Plant Identification Natural History |
| Connecticut Trees & Wildflowers: An Introduction to Familiar Species (State Nature Guides) | Kavanagh, J. | Wildflowers |
| Conservation Plants for the Northeast | Lorenz, D. G. ; W. C. Sharp; J. D. Ruffner | Plant Identification Natural History |
| Consider the Leaf: Foliage in Garden Design | Glattstein, J. | Gardening Landscaping |
| Container Gardening (Sunset Series) | Webster, Vicki | Gardening |
| Container Gardening for Dummies | Marken, Bill and Editors of the National Gardening Association | Gardening |
| Cook Forest: An Island in Time | Cook, A.E. | Natural History |
| Cornell Book of Herbs and Edible Flowers | Mackin, J. | Edible Plants |
| CRC Handbook of Medicinal Herbs | Duke. J. A. | Medicinal Plants Edible Plants |
| Creating a Butterfly Garden | Schneck, M. | Gardening Wildlife |
| Creating Sanctuary: A New Approach to Gardening in the Washington Metropolitan Area | Mitchell, S. | Gardening Wildlife |
| Creative Propagation | Thompson, P. | Plant Propagation |
| Dakota Flora: A Seasonal Sampler | Ode, D. J. | Plant Identification |
| Dale Groom's Texas Gardening Guide | Groom, D. | Gardening Landscaping |
| Daleae imagines : an illustrated revision of Errazurizia Philippi, Psorothamnus Rydberg, Marina Leibmann, and Dalea Lucanus emend. Barneby, including all species of Leguminosae tribe Amorpheae Borissova ever referred to Dalea | Barneby, Rupert C. | Mimosa spp. |
| Dangerous Flora | Allen, M. & M. Peissel | Poisonous Plants |
| Dangerous Liaisons?: When Cultivated Plants Mate with Their Wild Relatives | Ellstrand, N. C. | Plant Propagation |
| Dangerous Plants | Tampion, J. | Poisonous Plants Plant Identification |
| Deerproofing Your Yard & Garden | Rhonda Massingham Hart | Useful Plants |
| Delaware Trees & Wildflowers: An Introduction to Familiar Species (A Pocket Naturalist Guide) | Kavanagh, J. M. | Wildflowers |
| Desert Excellence A Guide to Natural Landscaping | Martino, S. & V. Swaback | Landscaping Natural History |
| Desert Plants of Utah | Andersen, B.A. | Plant Identification |
| Desert Plants: A Curator's Introduction to the Huntington Desert Garden | Lyons, G. | Plant Identification |
| Deserts (Audubon Society Nature Guides) | MacMahon. J.A. | Natural History Plant Identification |
| Design With Culture: Claiming America’s Landscape Heritage | Birnbaum, C. A. and M. V. Hughes | Landscaping Natural History |
| Designing Gardens with Flora of the American East | Summers, Carolyn | Wildlife |
| Designing with Succulents | Baldwin, D.L. | Gardening |
| Devil's Garden: Facts and Folklore of Perilous Plants | Ricciuti, E.R. | Poisonous Plants |
| Dictionary of Common Wildflowers of Texas and the Southern Great Plains | Holloway, J. E.; A. Neill | Wildflowers |
| Directory to Resources on Wildflower Propagation | Sullivan, G. A. & R. H. Daley | Plant Propagation Wildflowers |
| Discover California Wildflowers | Casebeer, M. | Wildflowers |
| Discovering Wild Plants: Alaska, Western Canada, the Northwest | Schofield, J.J. | Useful Plants Medicinal Plants Edible Plants Natural History |
| Distribution of the Vascular Flora of Georgia | Jones, S.B. & N.C. Coile | Plant Identification |
| Divine Nature of Plants: Wisdom of the Earth Keepers | Aversano, L. | Medicinal Plants |
| Dryland Gardening: Plants That Survive and Thrive in Tough Conditions | Bennett, J. | Gardening |
| Durable Plants for the Garden | Plant Select | Gardening |
| Dyes from American Native Plants: A Practical Guide | Richards, L.; R. J. Tyrl | Useful Plants |
| Dyes from nature | Buchanan, R. | Useful Plants |
| Early Uses of California Plants | Balls, E.K. | Useful Plants |
| Earth Medicine, Earth Food | Michael A. Weiner | Medicinal Plants |
| East Gulf Coastal Plain Wildflowers | Nelson, G. | Wildflowers |
| East-West Botanicals: Comparisons of Medicinal Plants Disjunct Between Eastern Asia and Eastern North America | Foster, S. | Medicinal Plants |
| Eastern Forests (Audubon Society Nature Guides) | Sutton, A. & M. Sutton | Plant Identification Natural History Wildlife |
| Eastern North America's Wildflowers | Linn, L. C. | Wildflowers |
| Easy Care Native Plants : A Guide to Selecting and Using Beautiful American Flowers, Shrubs, and Trees in Gardens and Landscapes | Taylor, P. A. | Gardening |
| Easy Gardens for the South (First Edition) | Cotten, H.; Crawford, P. and Pleasant, B. | Gardening |
| Eat The Weeds | Harris, B. C. | Edible Plants |
| Ecology & Restoration of Northern California Coastal Dunes | Pickart, A.J. & J.O. Sawyer | Natural History Invasive Plants |
| Ecology, Conservation, & Management of Vernal Pool Ecosystems | Witham, C.W. | Natural History |
| Ecosystems of Florida | Myers, Ronald L.; John J. Ewel | Invasive Plants Natural History Rare and Endangered Wildlife |
| Edible and Medicinal Plants of the Rockies | Kershaw, L. (Author), Craig, L. and McCloskey, E. (Editors), Sheldon, I. (Illustrator) | Plant Identification |
| Edible and Useful Plants of California | Clark, C.B. | Useful Plants Edible Plants |
| Edible and Useful Plants of Texas and the Southwest: A Practical Guide | Tull, D. | Plant Identification |
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