Rebutia -Xương Rồng

Species

The number of species is similarly debatable, because of disagreement both over what constitutes the genus and what constitutes a species. A very large number of plants that have circulated as species of Rebutia are now generally regarded as varieties, forms or synonyms of others.^[6] E. F. Anderson recognised forty-one species in 2001.^[7] As of March 2013, the Plant List accepted only 12 species, along with a much larger number of synonyms and unresolved names:^[8]

1. Rebutia albopectinata Rausch (synonym Aylostera)
2. Rebutia atrovirens (Backeb.) Sida (synonym Mediolobivia)
3. Rebutia deminuta (F.A.C. Weber) Britton & Rose (synonym Aylostera)
4. Rebutia fabrisii Rausch 1977 
5. Rebutia fidaiana (Backeb.) D.R. Hunt (synonym Weingartia)
6. Rebutia fiebrigii (Gürke) Britton & Rose (syn. R. fabrisii Rausch) (synonym Aylostera)
7. Rebutia heliosa Rausch (synonym Aylostera)
8. Rebutia langeri (J. Falkenberg & K. Neumann) G. Navarro (synonym Sulcorebutia)
9. Rebutia margarethae Rausch (syn. R. padcayensis Rausch)
10. Rebutia marsoneri Werderm.
11. Rebutiaminuscula K.Schum. (syns R. chrysacantha Backeb., R. senilis Small, R. violaciflora Backeb., R. wessneriana Brewer.)
12. Rebutia pulvinosa F. Ritter & Buining (synonym Aylostera)
13. Rebutia ritteri (Wessner) Buining & Donald (synonym Mediolobivia)