The original description of Rebutia (Aylostera) brunneoradicata was published in Kakteen und andere Sukkulenten 28(4): 77-78, 1977, the journal of

Regarded by some as a form of Aylostera atrovirens or A. pygmaea. In form, this red-flowered plant lies somewhere between

Lobivia (Aylostera) brachyantha was described in Kakteen und andere Sukkulenten, the journal of The Deutsche Kakteen-Gesellschaft, No. 207, p.130, by

The original description of Rebutia (Aylostera) tarvitaensis was published in Kakteen und andere Sukkulenten 28(4): 78, 1977, the journal of

Probably the main distinguishing feature of this species is the very large orange-red flowers, quite a bit larger than other

Plants of this species in the collection include: Weingartia naunacaensis BB398.01

Regarded by many as a form of the superspecies Aylostera pygmaea. This plant is nevertheless quite distinctive in spination and

Echinocactus (Aylostera) steinmanni (steinmannii) was originally brought back from Bolivia in 1903 by Professor Steinmann and described by Herman zu

A steinmannii is a species which covers a vast area of many thousands of square kilometres, albeit always at high

Regarded by many as a form of A. steinmannii, but given specific status following studies by Most & Papini (2011).

Rebutia (Aylostera) aureiflora was discovered by C. Backeberg in Salta, Jujuy, Argentina and first described in Der Kakteenfreund 1, p.