Synonyms:

Echinocactus steinmannii
Lobivia steinmannii
Mediolobivia steinmannii
Aylostera steinmannii
Rebutia costata
Digitorebutia costata
Mediolobivia costata,
Lobivia eucaliptana
Mediolobivia eucaliptana
Rebutia eucaliptana
Lobivia eucaliptana
Mediolobivia eucaliptana
Rebutia eucaliptana
Digitorebutia brachyantha
MedioLobivia brachyantha
Rebutia bracyantha
Rebutia christinae
Rebutia cincinnata
Rebutia camargoensis
Rebutia brunneoradicata
Rebutia poecilantha
Rebutia postosina
Rebutia rauschii,
Lobivia steinmannii
Rebutia applanata
Rebutia major
Rebutia melanocentra
Rebutia parvula
Rebutia tuberculata

Habitat:

This species is native to to the mountainous areas of Argentina.

Description:

Rebutia steinmannii v.costata is a very small globular cactus.The dark green stem up to 2,5 cm. ,single at first , grows in dense tufts with age. Usually forms a compact cluster.
Areoles are elliptical, raised on tubercles arranged in 8 or 10 distinct rib. The strongly spines , 7mm long, are white-grey color.
Flower is deep orange-red color. Develops in the spring at the base or halfway up each mature stem. More the plant is older more will flowering. The flowers, 2 cm in diameter and 3 cm in length are funnel-shaped, big respect the stem, often extend and curve upwards over the plant.

Cultivation:

Rebutia steinmannii v. costata is extremely well adapted to drought , needs a full sun or light shade. If the plant live indoor choose a bright place.
Water moderately in summer and remember always allow the soil to dry out before watering again. Reduce irrigation in autumn and stopping in winter.
The safety temperature is 0° C .
In cold season we recommended to put the plant in very airy spot and sheltered.
Use soil with good drainage to avoid rot.

Propagation:

Propagation is possible both from seed and from cuttings.
In seed multiplication this will sprout at a temperature of 21/27° C. Once the seeds begin to germinate, it is advisable to transplant them into a pot, only when they have reached 2.5 centimeters in height.
R. steinmannii v. costata easily propagates even from offset. You can separate the offsets, dry the cutting a few days, and repot into a pot with a soil mixture and keep it in a warm place until new roots emerge.

Curiosity:

The name of the Rebutia species takes its name from the french botanist P. Rebut, a great scholar and collector of cacti.
The genus Rebutia belong to the cactaceae family and includes more than 20 species all native to South America.