Gymnocactus

 

Gymnocactus is a genus of mostly small cactus from Mexico. They have been merged recently into Turbinicarpus. They are cultivated mostly for the esthetic quality of their spines.

All the species have offsets, but they grow slowly and take years to fill up even small containers. Because of their light requirements, if they can't be grown outside, they should be grown in a greenhouse or conservatory. Excessive watering can cause the Gymnocactus to develop cracks.

Gymnocactus horripilus is the largest species, it is heavily clumping and can reach 8 inches in diameter (20 cm).

Species and varieties
Gymnocactus aguirreanus synonym of Acharagma aguirreana
Gymnocactus beguinii synonym of Turbinicarpus mandragora ssp. beguinii
Gymnocactus beguinii synonym of Turbinicarpus mandragora ssp. pailanus
Gymnocactus beguinii synonym of Turbinicarpus mandragora ssp. pailanus
Gymnocactus beguinii synonym of Turbinicarpus mandragora ssp. pailanus
Gymnocactus beguinii var. smithii synonym of Thelocactus conothelos
Gymnocactus conothele synonym of Thelocactus conothelos
Gymnocactus gielsdorfianus synonym of Turbinicarpus gielsdorfianus
Gymnocactus goldii synonym of Turbinicarpus horripilus
Gymnocactus horripilus synonym of Turbinicarpus horripilus
Gymnocactus knuthianus synonym of Turbinicarpus saueri ssp. knuthianus
Gymnocactus mandragora synonym of Turbinicarpus mandragora
Gymnocactus roseanus synonym of Acharagma roseana
Gymnocactus saueri synonym of Turbinicarpus saueri ssp. nelissae
Gymnocactus saussieri synonym of Thelocactus conothelos
Gymnocactus subterraneus synonym of Turbinicarpus mandragora ssp. subterraneus
Gymnocactus subterraneus var. zaragosae synonym of Turbinicarpus mandragora ssp. zaragozae
Gymnocactus valdezianus synonym of Turbinicarpus valdezianus
Gymnocactus viereckii synonym of Turbinicarpus viereckii
Gymnocactus viereckii var. major synonym of Turbinicarpus viereckii ssp. major
Gymnocactus ysabelae synonym of Turbinicarpus saueri ssp. ysabelae
Gymnocactus ysabelae var. brevispinus synonym of Turbinicarpus saueri ssp. ysabelae

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