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| Botany for Gardeners | Capon, B. | Gardening Natural History |
| Botany in a Day: The Patterns Method of Plant Identification | Elpel, T. J. | Medicinal Plants Plant Identification Wildflowers |
| Bringing Nature Home: How Native Plants Sustain Wildlife in Our Gardens | Tallamy, Douglas W. | Wildlife |
| Bringing Nature Home: How You Can Sustain Wildlife with Native Plants | Tallamy, Douglas W. | Wildlife |
| Brush Management: Past Present, Future | Hamilton, W.T.; McGinty, A.; Ueckert, D.N.; Hanselka, C.W.; Lee, M.R. | Invasive Plants |
| Building Inside Nature's Envelope: How New Construction and Land Preservation Can Work Together | Wasowski, Andy | Landscaping |
| Bulbs of North America | North American Rock Garden Society | |
| Bulletproof Flowers for the South | Wilson, J. | Gardening |
| Butterflies of the East Coast: An Observer's Guide | R. Cech and G. Tudor | Wildlife |
| Butterflies: How to Identify and Attract Them to Your Garden | Schneck, M. | Gardening Wildlife |
| Butterfly Gardening for the South | Ajilvsgi, Geyata | Gardening Wildlife |
| Butterfly Gardening with Florida's Native Plants | Huegel, C. N. | Gardening Wildlife |
| Butterfly Gardening: Creating Summer Magic in Your Garden | Xerces Society and Smithsonian Institution | Wildlife |
| Cacti | Clive Innes and Charles Glass | Plant Identification |
| Cacti in New Mexico | Wooton, E. A. | Plant Identification |
| Cacti of Texas and Neighboring States: a field guide | Weniger, D. | Plant Identification |
| Cacti of Texas: a field guide | Powell, A. M.; J. F. Weedin and S. A. Powell | Natural History Plant Identification |
| Cacti of the Desert Southwest | Quinn, M. | Plant Identification |
| Cacti of the Trans-Pecos and Adjacent Areas | Powell, A. M. and Weedin, J. F. | Plant Identification |
| Cacti of the United States and Canada | Benson, L. D. | Plant Identification |
| Cactus Handbook | Haustein, E. | Plant Identification |
| Cactus of Arizona Field Guide | Bowers, N.; Bowers, R. and Tekiela, S. | Plant Identification |
| Cactuses of Big Bend National Park | Evans, Douglas B. | Plant Identification |
| California Chaparral: An Elfin Forest | Head, W.S. | Natural History |
| California Desert Wildflowers | Munz, P.A. | Wildflowers |
| California Deserts | Schad, J | Natural History |
| California Flora and Supplement | Munz, P.A.; D. D. Keck | Plant Identification |
| California Landscape Garden: Ecology, Culture & Design | Francis, M. & A. Reimann | Gardening Landscaping Wildflowers |
| California Mountain Wildflowers | Munz, P. A. | Wildflowers |
| California Native Plant Link Exchange (online) | http://www.cnplx.info/index.html | Wildflowers |
| California Native Plant Society's inventory of rare and endangered plants of California | Tibor, D. P. | Rare and Endangered |
| California Native Plants for the Garden | Bornstein, C.; D. Fross; B. O'Brien | Gardening |
| California Native Trees & Shrubs for Garden & Environmental Use in Southern California and adjacent areas | Lenz, L. & J.L. Dourley | Gardening Plant Identification |
| California Spring Wildflowers from the Base of the Sierra Nevada & Southern Mountains to the Sea | Munz. P. A. | Wildflowers |
| California Wildfire Landscaping | Gilmer, M. | Landscaping |
| California's Changing Landscapes: Diversity & Conservation of California Vegetation | Barbour, M.G., B. Pavlik, S. Lindstrom & F. Drysdale | Natural History |
| California's Wild Gardens: A Living Legacy | Faber, P. (ed.) | Natural History Plant Identification Rare and Endangered |
| California’s Wild Gardens: A Guide to Favorite Botanical Sites | Faber, P. M. | Natural History Wildflowers |
| Campanulas: A Gardener's Guide | Lewis, P.; M. Lynch | Gardening Plant Propagation |
| Canadian Wildflowers Through the Seasons | Ferguson, M. & R.M. Saunders | Wildflowers |
| Candidate threatened and endangered plants of Alaska with comments on other rare plants | Murray, D.F. ; R. Lipkin; A. L. Schell | Rare and Endangered |
| Canebrakes: Bamboo Forests of the Southeast, in Wild Earth journal, volume 12, number 2, pp. 38-45 | Platt, Steven; Christopher Brantley; and Thomas Rainwater | Natural History |
| Canoe Country Flora: Plants & Trees of the North Woods & Boundary Waters | Stensaas, M. | Plant Identification Natural History |
| Canyon Country Wildflowers, 2nd: A Guide to Common Wildflowers, Shrubs, and Trees (Wildflower Series) (Second Edition) | Fagan, D. | Wildflowers |
| Canyon Country Wildflowers: Including Arches and Canyonlands National Parks (Wildflower Series) (First Edition) | Fagan, D. | Plant Identification Wildflowers |
| Caprock Canyonlands: Journeys into the Heart of the Southern Plains | Flores, D.L. | Natural History |
| Carolinas Fruit & Vegetable Gardening: How to Plant, Grow, and Harvest the Best Edibles (Fruit & Vegetable Gardening Guides) | Elzer-Peters, K. | Gardening |
| Cast Iron Forest: a natural and cultural history of the North American Cross Timbers | Francaviglia, R. V. | Natural History |
| Catalog of the Flora of Colorado | Weber, W. A. and Wittmann, R. C. | Plant Identification |
| Catalogue of the flora of Missouri | Yatskievych, G. A. & J. Turner | Plant Identification |
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