Resource centre for rare and unusual plants, particularly those which have edible, medicinal or other uses. Offers a plant database, and various articles on gardening, perennials, and habitats.

Online USDA database of botanical information, images, and links on plants in the USA, including crops and invasives. Search by name, geographic distribution, or other characteristics.

Resources about toxic plants from the Veterinary Medicine Library.

Extensive information about plants native to southern Africa, including hundreds of alphabetically arranged plant portraits, by the National Botanical Institute of South Africa.

Mark shares photos and descriptions with personal experiences growing a large number of shade plants, both perennials and woody specimens.

Gardening resource site with an extensive plant directory featuring photos and cultural information.

Plant encyclopedia featuring photos and short descriptions of annuals, perennials, shrubs, and trees.

Offers descriptions, illustrations, and identification retrieval.

Pacific Northwest gardener presents essays for hundreds of species growing in her garden, with personal notes, history, cultural information, and photos for each.

A South African flower, plant and gardening portal with searchable plant database, photographs and information.

Translation program for botanical latin.

Database of detailed descriptions and growing tips for thousands of plants, including many not commonly grown. Profiles include cultural information, assessment of landscape value, and photos for most.

Offers a weed listing for the United States regions, primarily weeds occurring in lawns.