Articles about Cactus and Succulents

Cactus genera list of best for ... easy to grow, flowering etc
Succulent genera list of best for ... easy to grow, flowering etc

Evolution of Cactus and Succulents, through plate tectonics and changing climates.
Uses of Cactus and Succulents, mainly by native Americans, Africans and early Europeans.
What is a Cactus and Succulent?, what defines them!
CAM in Cactus and Succulents, a way of "breathing" through the stomata that reduces water loss.
Naming Cactus and Succulents, using Linnaeus's binominal naming system.
Convergent Evolution in Cactus and Succulents, why unrelated plants look alike.
Fibonacci in nature and Cactus and Succulents, a set of numbers found in nature and human arts or why C&S spiral.
Chemicals in Cacti ... but don't chew or smoke them!

Newsletters of the CSSA , lots of info from their affiliates in the "To the Point" newsletter.