Herbal Reality 

Traditional, scientific and practical insights into herbal medicine

National Institute of Medical Herbalists

The National Institute of Medical Herbalists is the UK’s leading professional body of herbal practitioners.

Henriette Kress' herbal website - 

Great information including pdf versions of many classic herbal texts

Online version of "A Modern Herbal"

A wealth of information about medicinal plants but beware of the word 'modern' - it was published in the 1930's!

American Botanical Council

Information, news and articles

Online wild flower guide

This is not very easy to use to identify plants but is a source of great pictures and information