| WeedAlert.com http://www.weedalert.com/ Offers a weed listing for the United States regions, primarily weeds occurring in lawns. | |
| Translat http://members.ozemail.com.au/~pbostock/ Translation program for botanical Latin. | |
| The Garden of Paghat the Ratgirl http://www.paghat.com/ Pacific Northwest gardener presents essays for hundreds of species growing in her garden, with personal notes, history, cultural information, and photos for each. | |
| The Families of Flowering Plants http://delta-intkey.com/angio/ Offers descriptions, illustrations, and identification retrieval. | |
| SunnyGardens.com http://www.sunnygardens.com/ Plant encyclopedia featuring photos and short descriptions of annuals, perennials, shrubs, and trees. | |
| Suite101: Plants & Bulbs http://www.suite101.com/plantsbulbs Information and how-to articles on a variety of plant topics by Angela England and other contributors. | |
| Rob's Plants: PlantLinks http://www.robsplants.com/plantlinks/ Directory of web pages about plants, selected for their interest to gardeners. Primarily organized by botanical classification. | |
| Plantwire http://www.plantwire.com/ Project to categorize plants by their flower color, as well as a variety of horticultural tags. Draws from a substantial photo database, with brief description and cultural details for each selection. | |
| Plants Toxic to Animals http://www.library.illinois.edu/vex/toxic/ Resources about toxic plants from the Veterinary Medicine Library. | |
| Plants National Database http://www.plants.usda.gov/ 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. | |
| Plants For A Future http://www.pfaf.org/ 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. | |
| PlantZAfrica http://www.plantzafrica.com/ Includes information about plants native to southern Africa, including hundreds of alphabetically arranged plant portraits, by the National Botanical Institute of South Africa. | |
| PlantBuzz http://www.plantbuzz.com/ Gardener Mark McDonough presents horticultural musings and illustrated plant studies, with particular emphasis on alliums and other bulbs for rock gardens. | |
| Plant This http://www.planthis.com.au/ Plant selector tool for Australian gardeners, offering suggestions based on gardening conditions and preferences. | |
| Pacific Northwest Plants http://pnwplants.wsu.edu/ Database on plant identification, culture and usage for the U.S. Northwest, including native and introduced species and their major varieties and cultivars. | |
| New Jersey Weed Gallery http://njaes.rutgers.edu/weeds/ Database of weeds, accessible by common and botanical names and by a thumbnail gallery. Summary information and photos are provided for each weed. | |
| Mister Smarty Plants http://www.mistersmartyplants.com/ Plant and flower identification: users upload pictures of unknown plants. Site members identify them and score points for correct answers. | |
| Landscape Plants For South Florida http://www.plantbook.org/ Manual of subtropical landscaping plants prepared by Palm Beach State College. Searchable database of Florida native and exotic plant species, with information on uses, horticultural characteristics, and photographs. | |
| Jesse Saylor's Plants http://saylorplants.com/ Plant information database, including photographs, Latin name pronunciations. Searchable by botanical and common names, and plant characteristics. | |
| Illinois' Best Plants http://www.bestplants.org/ 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. | |
