Plant America The most comprehensive URL search engine for plant related web sites available. Excellent.
The Ecology & Evolutionary Biology Greenhouse University of Connecticut botanical site. Good search.
United States Department of Agriculture Large plant data base
Toronto African Violet Society
GARDENS
Fairchild Tropical Gardens Tropical Gardens in Miami. One of the world's preeminent botanical gardens.
Bellingrath Gardens Semi Tropical Garden in Mobile, Alabama.
Catalogs & Dealers
Stokes Tropicals a site rated "Best of the Web" by gardening.com.
Rachel Sprout seedman.com.
Seeds a good source for seeds in Canada