The smooth green  epidermis  show up the  felty  areoles.

Family: Cactaceae (Cactus Family)

Scientific name: Astrophytum asterias (Zucc.) Lem "nudum"

Origin:  Nude plants are occasionally found in the natural habitat but many of the clones actually in cultivation are of garden origin (Nursery produced cultivar)

Conservation status: Listed in CITES appendix 1

Astrophytum asteris nudum
Round body with showy white areoles.

 The smooth green epidermis  show up the felty areoles.

Cultivation: Although regarded as a choice and difficult plant is not too difficult in a greenhouse, although grows quite slowly. It is sometime seen as a grafted plant but grows very well on its own roots too. Use mineral well permeable mineral soil with little organic matter (peat, humus). Water sparingly from March till October (weekly during summertime, if the weather is sunny enoughand) , with a little fertilizer added. keep perfectly dry in winter at temperatures from 5 to 15 degrees centigrade. (but it is relatively cold resistant and hardy to -7° (-10°)C for short periods) In the rest period no high atmospheric humidity!! They need a good amount of light shade to full sun this help to keep the plants healthy, although slow growth.
 
Propagation: Almost exclusively by seed that germinate rapidly. Plants are sometimes grafted onto column-shaped cacti.