Need a good reference book for identifying cacti & succulents

What would be a good reference book that you could recommend for identifying by cacti & succulents? This would be a book that has dichotomous keys, perhaps a manual of cactus & succulent identification. This might even include photographs.

The Illustrated Encyclopedia of Cacti

That looks like a great book: http://www.google.com/search?q...

calamospiza: You can post photo's of your cacti here on this forum or on the Plant Identification forum: http://garden.org/forums/view/...

Someone might recognize them and be able to help with identification.

this one looks good but i dont have it so i cant say
Succulents: The Illustrated Dictionary

I have the first (1994) of the Succulents: The Illustrated Dictionary. I find it useful for identification but it is not complete. Maybe that's why they came out with Book 2 of the same title.
Entries include plant photo, genus name, brief description of plant height, stem info, leaf info, flower info, country/area of origin. Good photos.

Thanks much for the information, David

One of the best books is the RHS Encyclopedia - I think it's all kinds of plants, not just succulents, but it's got lots of pictures. No key that I recall though. I don't have it, but my local library has it.