Origin and Habitat: Bolivia, Tarija.
Altitude: 1000-2700 metres above sea level.
Habitat: Grassy / rocky slopes.

• Rebutia deminuta subs. kupperiana (Boed.) Hjertson
• Aylostera kupperiana (Boed.) Backeb.
• Echinorebutia kupperiana (Boed.) Frič & Kreuz.
• Rebutia kupperiana Boed.

• Rebutia deminuta (F.A.C.Weber) Britton & Rose
• Aylostera deminuta (F.A.C.Weber) Backeb. in Backeb. & F.M.Knuth
• Echinocactus deminutus (F.A.C.Weber) Gürke
• Echinopsis deminuta F.A.C.Weber
• Echinorebutia deminuta (F.A.C.Weber) Frič & Kreuz.
• Rebutia albiareolata F.Ritter
• Aylostera albiareolata (F.Ritter) Mosti & Papini
• Aylostera pseudodeminuta var. albiareolata hort.
• Rebutia fiebrigii cv. albiareolata M. Winberg
• Rebutia pseudodeminuta subs. albiareolata hort.
• Rebutia aureispina Kníže
• Aylostera aureispina hort., Kníže
• Aylostera sp. aureispina hort.
• Rebutia deminuta subs. kupperiana (Boed.) Hjertson
• Aylostera kupperiana (Boed.) Backeb.
• Echinorebutia kupperiana (Boed.) Frič & Kreuz.
• Rebutia kupperiana Boed.
• Rebutia deminuta f. pseudominuscula (Speg.) Buining & Donald
• Aylostera deminuta var. pseudominuscula (Speg.) Backeb.
• Aylostera pseudominuscula (Speg.) Speg.
• Echinocactus pseudominusculus Speg.
• Echinopsis pseudominuscula Speg.
• Echinorebutia pseudominuscula (Speg.) Frič & Kreuz.
• Rebutia pseudominuscula (Speg.) Britton & Rose
• Rebutia minutissima F.Ritter
• Aylostera minutissima hort.
• Rebutia pseudodeminuta subs. minutissima hort.
• Rebutia nogalesensis F.Ritter
• Aylostera fiebrigii var. nogalesensis R.Hillmann
• Aylostera mogalesensis hort.
• Aylostera najalensis hort.
• Aylostera nogalesensis (F.Ritter) Mosti & Papini
• Rebutia pseudodeminuta var. schumanniana Backeb.
• Aylostera pseudodeminuta var. schumanniana (Backeb.) Backeb.
• Aylostera schumanniana hort.
• Rebutia pseudodeminuta f. schumanniana (Backeb.) Šída
• Rebutia schumanniana hort.
• Rebutia robustispina F.Ritter
• Aylostera robustispina (F.Ritter) Mosti & Papini
• Rebutia pseudodeminuta var. robustispina Brunelle
• Rebutia spegazziniana subs. robustispina hort.
• Rebutia sanguinea F.Ritter
• Aylostera sanguinea hort.
• Rebutia pseudodeminuta subs. sanguinea hort.
• Rebutia pseudodeminuta var. sanguinea (F.Ritter) Brunelle
• Rebutia spegazziniana var. sanguinea hort.
• Rebutia wahliana Rausch
• Aylostera wahliana (Rausch) Mosti & Papini
• Mediolobivia wahliana hort.
• Rebutia pseudodeminuta subs. wahliana (Rausch)

Description: Clumping cactus forms extensive colonies up to 15 (or more) cm in diameter.
Stems: Rounded 3 or more cm in diameter, dark green with bronze hue, in cultivation it can grow up to 10 cm tall.
Ribs: About 15
Areoles: Almost round, with short yellowish indumentum.
Central spines: Straight 1-3 , sometimes 4, directed upward, thicker and are bigger than radial, dark brown throughout the entire length, up to 12 mm (or more) long.
Radial spines: 10 to 15 of different length up to 5 mm, white with brown apex, needle-shaped.
Flowers: Approximately 4 cm long, 3,5 cm in diameter, fiery-orange-red to deep scarlet, the pistil and stamens are white.

Bibliography: Major references and further lectures
1) Roger Spencer “Horticultural Flora of South-eastern Australia Volume 2, Flowering Plants: Dicotyledons. Part 1, the Identification of Garden and Cultivated Plants” UNSW Press, 1995
2) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
3) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
4) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
5) N. L. Britton, J. N. Rose “The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family.” Volume 4, The Carnegie Institution of Washington, Washington 1923
6) Curt Backeberg “Die Cactaceae: Handbuch der Kakteenkunde” Gustav Fischer Verlag, Stuttgart New York 1982–1985

Cultivation and Propagation: Rebutia kupperianaSN|4979]]SN|4979]] is a summer grower species that is easy to cultivate.
Growth rate: It is a relatively rapidly growing and easily flowering species that will make clumps given the best conditions.
Soils: It likes very porous standard cactus mix soil. Prefer a neutral or low pH compost, avoid substrata rich in limestone.
Repotting: It is better that they are repotted regularly. Repotting will increase the number and size of stems and will increase the number of flowers produced. Repot yearly until reaching about 100mm in size, then every two or three years will suffice. Repotting is best done at the end of winter but can be done at other times. Do not water for a couple of weeks after repotting to reduce risk of root rot via broken roots. Use pot with good drainage.
Watering: Needs moderate to copious waterings in summer, but do not overwater (Rot prone), keep dry in winter at a minimum temperature of 0°C.
Fertilization: Feed with a high potassium fertilizer in summer.
Hardiness: Reputedly resistant to frost if kept on the dry side prior to, and during, cold weather (hardy to -4 C ° C, or less for short periods).
Exposition: The plant tolerates bright situations but enjoys filtered sunlight or afternoon shade, inside it needs bright light, and some direct sun. Tends to bronze in strong light, which encourages flowering and heavy spine production, but is likely to suffer from sun scorch or stunted growth if over exposed to direct sunlight during the hottest part of the day in summer.
Uses: It is an excellent plant for container growing. It always looks good and stays small. It look fine in a cold greenhouse and frame or outdoor in a rockery.
Pests & diseases: It may be attractive to a variety of insects, but plants in good condition should be nearly pest-free, particularly if they are grown in a mineral potting-mix, with good exposure and ventilation. Nonetheless, there are several pests to watch for:
- Red spiders: Red spiders may be effectively rubbed up by watering the plants from above.
- Mealy bugs: Mealy bugs occasionally develop aerial into the new growth among the wool with disfiguring results, but the worst types develop underground on the roots and are invisible except by their effects.
- Scales: Scales are rarely a problem.
- Rot: This species is particularly easy and accommodating, seldom suffer of cryptogamic diseases. Rot it is only a minor problem with rebutias if the plants are watered and “aired” correctly. If they are not, fungicides won't help all that much.
Propagation: Division, direct sow after last frost. Seeds germinate in 7-14 days at 21-27° C in spring, remove gradually the glass cover as soon the plants will be well rooted (ca 1-2 weeks) and keep ventilated, no full sun for young plants! Seed Collecting: Permit fruit to ripen. Fruit must be significantly overripe before harvesting seed; clean and dry seeds. To make a cutting twist off a branch and permit it to dry out a couple of weeks, lay it on the soil and insert the stem end partially into the soil. Try to keep the cutting somewhat upright so that the roots are able to grow downward.