Monrovia Plant Finder
provides to retailers and consumers an online plant catalog. You can enter the name of the plant you wish to learn more information about and their site will provide you with a picture of the plant and valuable information.
The Lady Bird Johnson Wildflower Center
mission is to educate people about the environmental necessity, economic value, and natural beauty of native plants.
The Ornamental Plants Database From Michigan State University contains information about trees, shrubs, vines, ground covers, perennials, annuals, house plants, insects, diseases, cultural information and other topics.