Tephrocactus
Tephrocactus
http://www.tephroweb.ch/
Trichocereus
Trout's notes
http://www.troutsnotes.com/
Ariocarpus
Ariocarpus
http://www.living-rocks.com/
Browningia
Browningia
http://www.columnar-cacti.org/browningia/index.html
Rhipsalis
A guide to rhipsalis, lepismium, hatiora, schlumbergera.
http://www.rhipsalis.com/
Overzicht soorten
Overzicht soorten
http://cactiguide.com/
Astrophytum
Monographie und dokumentation der gattung astrophytum, monograph and documents of the genus astrophytum, bilder, photos, pictures
http://www.astrobase.de/
Echinocereus
The echinocereus reference collection home page
http://www.lisowski58.freeserve.co.uk/
Epiphyllum
Epiphyllum
http://www.epiphyllumsociety.org/
Ferocactus
Nobbi's ferokakteen - die faszination der gattung ferocactus
http://www.ferokaktus.de/
Copiapoa
Copiapoa's are a unique cactus from chile. this web site addresses their environment and any other bit of information i can come up with about them.
http://www.stormloader.com/rdrnb/copiapoa.html
Echinocereus
Echinocereus
http://www.echinocereus.de/
Lophophora williamsii
Lophophora williamsii
http://leda.lycaeum.org/?id=239
Mammillarias
Mammillaria - all about cactus genus mammillaria - more than 1000 mammillaria pictures - mammillaria forum - mammillaria fields numbers - 200 mammillaria species described
http://www.mammillarias.net/index.php
Notocactus
Notocactus information exchange - information on notocactus
http://www.mfaint.demon.co.uk/cactus/noto/index.html
Tephrowelt
Tephrowelt
http://www.tephrowelt.de/
Gymnocalycium
Informations, descriptions, lists, pictures, maps and much more concerning the genus gymnocalycium
http://www.richtstatt.de/gymnos/e_index.htm
Frailea
The most comprehensive reference on the genus frailea available. continuously revised and updated
http://www.frailea.com/
Echinofossulocactus
Echinofossulocactus
http://saimon.softech.cz/
Echinopsis
Echinopsis
http://www.fortunecity.com/greenfield/vine/312/isi2000.html
Espostoa
Espostoa
http://www.columnar-cacti.org/espostoa/index.html
Ferocactus
Ferocactus
http://theferocactus.free.fr/
Turbinicarpus
Turbinicarpus information exchange - information on turbinicarpus
http://www.mfaint.demon.co.uk/cactus/turbo/