Mosses and Liverworts in Wales
Excellent set of pages on Welsh bryophytes, also with good habitat descriptions.
Photographs of liverworts
(D.S. Rycroft, University of Glasgow)
Some nice photographs, mostly Scottish.
Flora of Europe: a photographic herbarium
Photographs of European wild flowering plants.
Wild Flowers of the British Isles
Excellent and important reference site for photographs of British flowering plants, also with links to companion sites for Europe and Australia.
"This site is all about flowers that grow in North-Western Europe - particularly the wild flowers of the British Isles." A large collection of photographs (also including a selection of bryphytes, lichens and fungi), organised by colour and by geography as well as by systematics and alphabetically. A valuable British resource.
British Wild Flowers
Another major compilation of photographs of British wild flowers, with contributions from other photographers. However, contributions in the more critical genera need to be vetted more carefully and the index seems to be common names only. The display is IE specific, with page arrangements incorrectly shown in Firefox without an addon being installed (so, based on my own current user statistics, that's about 40% of visitors who will not be able to see the site properly). On the other hand, there is a fine set of reference photographs for anyone interested in microspecies of Rubus (bramble) – a specialised but very valuable resource.
A beautifully designed, authoritative and highly recommended site with many, many photographs carefully chosen to show key features. If only other websites were this good!
Belles Fleurs de France
A large site with photographs and descriptions of the French flora.
University of Wisconsin-Madison: Plant Systematics Collection
Many images of American plants.
A Digital Flora of Newfoundland and Labrador Vascular Plants
(The Provincial Museum of Newfoundland and Labrador)
A beautiful site with many, many stunning images, including many species that we have in Britain.
Gallery of Connecticut Wildflowers
(Connecticut Botanical Society)
A good site for descriptions and illustrations of a large selection of American species – a valuable web flora.
An excellent and comprehensive if slightly quirky archive of photographs of carnivorous plants. Long one of my favourite sites.