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Origin and Habitat: North Western Argentina (Tucuman)
Type locality: Trancas, Argentina.
Synonyms:
- 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 deminuta (F.A.C.Weber) Britton & Rose
Cactaceae (Britton & Rose) 4: 285. 1923
Synonymy: 50
- 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
- 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: Rebutia deminutaSN|5033]]SN|4953]] is a smallest free flowering cactus species, solitary or branching around the base to form small mounds up to 10 cm in diameter (or more) barely rising above ground level. This species is very variable and has received many names. Related species include the Bolivian Rebutia kupperianaSN|4979]]SN|4979]] Boed. which has purplish stems, brown spines and deep red flowers, and Rebutia spegazzinianaSN|4953]]SN|5033]] Backeb. from North-West Argentina which has prominent ribs and deep red flowers.
Stems: Globular to more or less cylindrical, sometimes tapering apically, dark shiny green, 5 to 6 cm high, up to 3,5 cm in diameter (but often more in cultivation).
Ribs: 10-14 not prominent, somewhat spiraled, more or less tuberculate. Tubercles conical 5 x 7-8 mm.
Areoles: Whitish grey 7-11 mm apart.
Spines: 10-12, somewhat rigid 4-6 mm long, sometimes curved,ochre or lark pinkish. becoming white with a rusty brown tip and eventually white finally almost transparent white.
Central spines: 1-4.
Radial spines: 7-14.
*Flowers: Several, red, orange or dark purple, growing in a ring from around the base of the stem. Funnel-shaped up to 3 cm long and in diameter. Pericarpel with 7-8 scales with a solid tube having scales with axillary hairs. Perianth disc-shaped; outer perianth-segments lanceolate, purple, 4 to 5 mm long; inner perianth-segments 15, red to orange, 5 to 18 mm long; pericarpel bristly, 6 mm in diameter with about 7-8 scales with axillary hairs; tube 1,5 cm long firm; styles pink stigma-lobes white; stamens with white filaments; anthers yellow.
Seeds: Strongly warty with a large hilum.
Subspecies, varieties, forms and cultivars of plants belonging to the Rebutia deminuta group
Rebutia albiareolata F.Ritter
Rebutia aureispina Kníže
- Rebutia buiningiana Rausch
- Rebutia deminuta (F.A.C.Weber) Britton & Rose
Rebutia deminuta subs. kupperiana (Boed.) Hjertson
- Rebutia deminuta f. pseudominuscula (Speg.) Buining & Donald
- Rebutia minutissima F.Ritter
- Rebutia nitida F.Ritter
- Rebutia nogalesensis F.Ritter
- Rebutia pseudodeminuta Backeb.
- Rebutia pseudodeminuta var. schumanniana Backeb.
Rebutia robustispina F.Ritter: has stronger shaggy stiff brown spines. Distribution: Tarija, Bolivia.
- Rebutia sanguinea F.Ritter
Rebutia sanguiniflora n.n., catalog name
- Rebutia wahliana Rausch
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
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