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Subfamilia Cactoideae, tribus Trichocereae
Type species is Sulcorebutia steinbachii.
The distribution is in a relatively small area of Bolivia east of the high Andes, 2.000-4.000 m.
The name derives from Latin sulcus, a groove, and refers to the way the clusters of spines usually seem to come out of a little felted groove at the top of the tubercles, and rebutia, name for French nurseryman and wine-grower, Rebut. The first known species were placed in the old genus Rebutia but were later removed to a seperate genus of their own, Sulcorebutia.
Sulcorebutia tends to be small low growing, solitary or in clusters, globose to short cylindrical stems with tubercles. Flowers small but very colourful with deep orange-red to yellow, borne at areoles to the side or near the base.
They need low temperatures in winter for heavy pruducing of flowers, eg.2 to 8 C. They like bright light but not direct sun rays in hot climates and need very well ventilation. They are rot prone, especially having tap root ones. Underpotting is very useful.
One of the most popular South American cacti is Sulcorebutia, easily grown and producing very nice flowers. However, this has resulted hundreds of species descriptions which most of them can not be accepted. International Cactaceae Systematics Group (ICSG) submerged the genus Sulcorebutia into the genus Rebutia , (The New Cactus Lexicon, 2006). But this is a broad sense lumping and needs much more data, especially in genetics, for the confirmation of the genus Rebutia of ICSG is monophyletic.
I believe that Sulcorebutia is clearly distinct from the core genus Rebutia and must be regarded as a good genus.
Here, I treated my Sulcorebutia species names according to J.Pilbeam's book A Sulco Gallery (2004), and partially with the aid of the genus Rebutia of NCL.
As to Pilbeam's book, there are 42 sp. and 26 ssp./var. in the genus. In NCL, after heavily lumping, there are 12 sp. and 2 ssp. in the Sulcorebutia.
I cited accepted names as to NCL in the caption lines of species photos.
To obtain some knowledge about Cactus family, and cultivation methods, seed growing, photography etc., please see MY JOURNALS page..
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Sulcorebutia langeri HS240 03