This directory of plants and gardening includes, annuals, bulbs, cactus, succulents, fruit, grass, water plants, herbs, spices, houseplants, perennials, shrubs, bushes, trees, vegetables, vines, crawlers and wild flowers. Look here for information about identifying plants, various methods of cultivation, soil and temperature requirements, pruning, means of propagation, and other related details.
National Agricultural Library Digital Repository
Find anything from gypsy moths to vegetable shipments from digitized US Department of Agriculture publications.
Native American Ethnobotany
An abridged edition of the print version, the Native American Ethnobotany site focuses on foods, drugs, dyes and fibers that Native Americans derived from plants.
Native Plant Database
From this page you can explore the wealth of native plants in North America. Use the options to search for 7,695 native plants by scientific or common name or choose a particular family of plants.
New York Botanical Garden
The New York Botanical Garden is a public garden and research institution dedicated to botanical science and the documentation and preservation of the Earth's plant biodiversity. The site has a searchable database of the Garden's virtual herbarium collection with images.
Ohio Trees Index
The Ohio Department of Natural Resources provides information about trees found in Ohio including, identification features, descriptions and images of common species.
This plant index site from the Kemper Center for Home Gardening provides extensive plant information and images for nearly 4,000 plants. The site can be searched by botanical or common names
Ohio State University has created PlantFacts, a site that offers a plant search engine, database, dictionary, images of plants and insects, gardening videos, and answers to over 800 gardening questions.
This website provides in-depth information about all types of plants found in the U. S. and its territories, including the scientific names, lists by state, endangered plants, and invasive and noxious plants.
Three botanical institutions, The Morton Arboretum, The Field Museum of Natural History, and the Chicago Botanic Garden have created an on-line searchable herbarium that provides data and digital images of specimens and labels from the Chicago region.