Gymnocalycium denudatum (spider cactus), a type of cactus plant from southern Brazil, is a fat, globular cactus that gets its common name from the arrangement of its spines. It has very broad ribs and a slight "chin" beneath the yellowish spines. In very bright light this cactus takes on a brownish cast.

Cactus Image Gallery

This cactus is a native of southern Brazil.
Spider cactus (Gymnocalycium denudatum)
See more pictures of cacti.

A tiny cousin, Gymnocalycium mihanovichii, has a bright red parasitic form called 'Hibotan' that cannot survive unless it is grafted onto a cactus that provides chlorophyll and produces food for both. Give gymnocalycium bright light, heavy soil with excellent drainage, house temperatures and good air circulation. The many varieties grow easily from seed.

Cactus Profiles

Aeonium Melocactus
Agave Mountain Cereus
Alluaudia procera
Nananthus schoonesii
Calibanus hookerii
Rat Tail Cactus
Crassula Rebutia
Echeveria Sedum
Elephant Bush
Senecio
Eulychnia saint-pieana
Spider Cactus
Ferocactus Stapelia
Foxtail Asparagus Fern
Tephrocactus
Gasteria Torch Cactus
Haageocereus chrysacranthus
Trichodiadema olearea
Holiday Cactus
Yucca
Kalanchoe


Related Links: