Article listing a number of poisonous plants, with links to further information about those plants.

Showcases new varieties of flowers, vegetables, and plants for garden performance.

Starting point for information on (types of) plants, with summary information for many species and varieties.

Features a new plant every week, with photo, description, and cultural information. Previously featured plants can be selected by botanical or common name. Focus is on plants for greenhouse culture.

Database with over 80,000 plants with cultivation information and pictures supplied by member gardeners.

This resource for gardeners in the Denver metro area includes a sizeable database of plants with photos and cultural information.

Features searchable database of thousands of plants, with basic information and often photos. Includes many succulents, herbs, and tropical fruit trees.

Describes plants that lived during the age of the dinosaurs, with brief information, lists, and links to other resources for plants of the mesozoic era.

Features cultural information, uses, handling tips, and links for an extensive list of fruits and vegetables.

Garden plant finder. Searchable by garden conditions and design requirements such as flower color, size and growth habit. Search results include plant photo and summary information.

Offers links to gardening websites arranged by plant type, with a brief description of each site.

Features hundreds of plant portraits, each illustrated with several photos, documenting the garden uses and cultural requirements of each species or cultivar.

Collection of hundreds of plant photos with brief descriptions. Each of the plants grows in India, but both natives and non-natives are featured.

Searchable database with basic information and some photographs of plants grown primarily for their foliage. Japanese and English.

Extensive set of fact sheets and links from the University of Florida.

Descriptions of different types of flowers suitable for small gardens. Includes Phlox, Nasturtium, Lobelia Carnation, Zinnia, Alyssum, Begonia, and Dahlia.

Weblog-style source of information on various garden plants, fruits, and vegetables. It is the English-language companion to the French aujardin.info.

Guide to growing and caring for houseplants, vegetables, trees and shrubs. Also features common pests and a miscellaneous section. From the University of Saskatchewan Extension.

Forum that allows users to upload images of plants that they are trying to identify.

Features a searchable, multilingual garden plant encyclopedia, with a summary of cultural and botanical information and in many cases photos.

Horticultural database with over 100,000 species and cultivars. Comments, ratings, and photos for many varieties supplied by members of the Gardenweb community.

Extensive directory of plants, categorized by genus, includes summary cultural information and small photograph for each plant.

Chicago Botanic Garden provides a database of recommended plants for Illinois gardens, from perennials to trees, with photos and information on their culture and use.

Database of weeds, accessible by common and botanical names and by a thumbnail gallery. Summary information and photos are provided for each weed.

Gardener Mark McDonough presents horticultural musings and illustrated plant studies, with particular emphasis on alliums and other bulbs for rock gardens.

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

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.

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

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.

Searchable database containing the results of Chicago Botanic Garden plant trials. Each entry contains a rating, photos, and cultural information.