Links

Societies, Groups

Fachgesellschaft andere Sukkulenten e.V. (de)
The Haworthia Society
Yahoo Groups: Haworthia

Science, Archives, Data Bases

Botanical Garden Information System
International Code of Botanical Nomenclature (ICBN), St. Louis Code (2000)
International Code of Botanical Nomenclature (ICBN), Tokyo Code (1994)

Plant Images

Cok & Ine Grootscholten: Haworthia (en)
Haworthia Gallery (cz)
Aloe (Google), Aloe (AllTheWeb)
Gasteria (Google), Gasteria (AllTheWeb)
Haworthia (Google), Haworthia (AllTheWeb)
Pasquale Ruocco: Haworthia, Aloe & Gasteria

Homepages, Blogs

François Hoes: Haworthia
Jakub Jilemicky: Haworthias & Gasterias
Joyce L. Cocozza: Haworthia
Philippe Faucon: Haworthia

Succulent Nurseries, Seed Sources

Eden-Plants
B & T World Seeds
Exotica - Botanical Rarities