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USDA PLANTS Database - http://plants.usda.gov/
Plant names, photos, fact sheets, and information on culturally significant plants, noxious and invasive plants, and threatened and endangered plants, with links to thousands of plant-related sites and software tools. |
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Internet Directory for Botany - http://www.botany.net/IDB/
an index to botanical information available on the Internet. It consists of two parts, an alphabetical directory and a categorical directory. |
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MBG: W3TROPICOS - http://mobot.mobot.org/W3T/Search/vast.html
Database of plant names, information on them, and the sources of information. |
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World-Wide Web Virtual Library: Botany - http://www.ou.edu/cas/botany-micro/www-vl/
Collection of scholarly and research links for plant biology. |
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CalFlora Database - http://www.calflora.org/
provides access to information about all 8375 currently recognized plants in California, including more than 670,000 plant observations and 20,000 photographs. |