Good Cooking's Plant and Herb Information

National USDA PLANTS Database Access The PLANTS Database provides a single source of standardized information about plants. PLANTS provides standardized plant names, symbols and other plant attribute information. Still under development. 

PLANTfacts The Ohio State University Factsheet Database Guides for answering plant-related questions from 46 different universities and government institutions across the United States and Canada.

Plant Information Center, Virtual Herbarium at the University of North Carolina.  This is a must visit site for the gardener or chef.

The Gardening Archive Is at the Lysator Swedish site and has an emphasis on plants suitable for a cold temperate climate.