Links

Online Reference

• Bihrmann's Caudiciforms
• Cactus Art - The world of cacti & succulents
• Introduction to Caudiciform Plants, Also Known as Fat Plants
• Introduction to Agaves
• SucculentGuide.com
• The Succulent Plant Page
• CactiGuide.com
• Cactus and Succulents - The world of low-water plants
• All you wanted to know about Haworthia & Gasteria
• Gerhard Marx - Succulent cultivation
• Bill's Haworthias
• Asphodelaceae Anonymous
• Brookside Nursery
• Plants of Southern Africa
• Flora of Zimbabwe
• Wild Madagascar Flora

Organization & Society

• International Euphorbia Society
• The Euphorbia Planetary Biodiversity Inventory project
• Pachypodium.org
• International Sansevieria Society
• British Cactus & Succulent Society
• Cactus and Succulent Society of America
• Haworthia Society of Japan
• Palm and Cycad Societies of Australia

Community & Facebook Groups

• Cactus and Succulent Society of Indonesia
• Planet Euphorbia
• Planet Caudiciform
• Gardenweb Cacti & Succulents Forum
• Cactus and Succulent Society of America
• Haworthia
• Planet Haworthia

Photo Gallery

• Succulent, Caudiciform and Pottery by Keith Kitoi Taylor.
• Succulent by F. Arias
• Cactus & Succulent by Gillian.
• Cocozza Collection of Haworthia, Conophytum & Companions
• Cok Grootscholten Succulent World
• Aloes Photo by alloe.

PDF & E-Books

• Gymnocalyciums by E. W. Putnam - 1978
• Gymnocalycium. A collector's guide by John Pilbeam - 1995
• Pachypodium Culture Guide - Highland Succulents
• Socotra - The Lost Island

Articles

• Socotra: The Island of Strange Plants
• The 'lost world' of Socotra, a remote island with plants up to 20 MILLION years old
• Caudiciforms: They Got The Back That Makes The Beat Go BOOM.