Origin and Habitat: Grows in the Cordillera de Cochabamba, in southern Bolivia.
Habitat: S. steinbachii grows mainly on a flat, dry, stony area, while the tiraquensis populations grows in a moister zone. Altitude 2950 – 3900 m.
Ecology: Thanks to the fog banks coming from the tropical lowlands of the Chaparé, the plants have enough humidity all year round to capture with their numerous spines.

• Rebutia steinbachii subv. aguilari Gertel
• Rebutia tiraquensis var. aguilarii K.Augustin & Gertel
• Rebutia tiraquensis subs. tiraquensis var. aguilarii Fritz, Gertel, J.de Vries
• Sulcorebutia tiraquensis var. aguilarii K.Augustin & Gertel
• Weingartia tiraquensis var. aguilarii (K.Augustin & Gertel) Hentzschel & K.Augustin

• Rebutia steinbachii Werderm.
• Sulcorebutia steinbachii (Werderm.) Backeb.
• Weingartia steinbachii (Werderm.) F.H.Brandt
• Rebutia glomerispina Cárdenas
• Sulcorebutia glomerispina (Cárdenas) Buining & Donald
• Weingartia glomerispina (Cárdenas) F.H.Brandt
• Rebutia polymorpha Cárdenas
• Sulcorebutia polymorpha (Cárdenas) Backeb.
• Sulcorebutia steinbachii var. polymorpha (Cárdenas) Pilbeam
• Sulcorebutia steinbachii subvar. polymorpha (Cárdenas) Gertel
• Weingartia polymorpha (Cárdenas) F.H.Brandt
• Rebutia steinbachii f. cristata hort.
• Sulcorebutia steinbachii f. cristata hort.
• Rebutia steinbachii subs. verticillacantha (F.Ritter) Donald ex D.R.Hunt
• Sulcorebutia steinbachii subs. verticillacantha (F.Ritter) Fritz, Gertel & J.de Vries
• Sulcorebutia verticillacantha F.Ritter
• Weingartia steinbachii subs. verticillacantha (F.Ritter) Hentzschel & K.Augustin
• Weingartia verticillacantha (F.Ritter) F.H.Brandt
• Rebutia taratensis Cárdenas
• Sulcorebutia steinbachii var. taratensis (Cárdenas) Fritz, Gertel & J.de Vries
• Sulcorebutia taratensis (Cárdenas) Buining & Donald
• Sulcorebutia verticillacantha var. taratensis (Cárdenas) K.Augustin & Gertel in K.Augustin, Gertel & Hentzschel
• Weingartia steinbachii var. taratensis (Cárdenas) Hentzschel & K.Augustin
• Weingartia taratensis (Cárdenas) F.H.Brandt
• Rebutia totorensis Cárdenas
• Sulcorebutia tiraquensis subs. totorensis (Cárdenas) Gertel & J.de Vries
• Sulcorebutia totorensis (Cárdenas) F.Ritter
• Weingartia tiraquensis var. totorensis (Cárdenas) Hentzschel & K.Augustin
• Weingartia totorensis (Cárdenas) F.H.Brandt
• Rebutia tuberculato-chrysantha Cárdenas
• Sulcorebutia tuberculato-chrysant (Cárdenas) Bredero & Donald
• Sulcorebutia tuberculato-chrysant (Cárdenas) F.H.Brandt
• Rebutia vizcarrae Cárdenas
• Sulcorebutia vizcarrae (Cárdenas) Donald
• Weingartia vizcarrae (Cárdenas) F.H.Brandt
• Sulcorebutia augustinii Hentzschel
• Sulcorebutia steinbachii subvar. augustinii Gertel
• Sulcorebutia tiraquensis var. augustinii (Hentzschel) Gertel & J.de Vries
• Weingartia augustinii (Hentzschel) Hentzschel & K.Augustin
• Sulcorebutia augustinii f. cristata hort.
• Sulcorebutia clavata (F.H.Brandt) Pilbeam
• Weingartia clavata F.H.Brandt
• Sulcorebutia clizensis Rausch
• Rebutia cochabambina var. clizensis hort.
• Sulcorebutia hoffmanniana var. clizensis hort.
• Sulcorebutia kruegeri var. cochabambina f. clizensis hort.
• Sulcorebutia steinbachii subs. cochabambina var. clizensis hort.
• Sulcorebutia cochabambina Rausch
• Sulcorebutia hoffmanniana var. cochabambina hort.
• Sulcorebutia steinbachii subs. cochabambina
• Sulcorebutia electracantha (Backeb.) E.F.Anderson
• Sulcorebutia tiraquensis var. electracantha Backeb.
• Weingartia electracantha (Backeb.) F.H.Brandt
• Sulcorebutia oenantha var. Epizana hort.
• Sulcorebutia steinbachii subvar. epizanensis
• Sulcorebutia steinbachii var. Epizana hort.
• Sulcorebutia heinzii Halda, Heřtus & Horáček
• Sulcorebutia sp. HS151 Totora-Omereque
• Sulcorebutia hoffmanniana (Backeb.) Backeb.
• Lobivia hoffmanniana Backeb.
• Sulcorebutia krugerae var. hoffmanniana (Backeb.) Donald
• Weingartia hoffmanniana F.H.Brandt
• Sulcorebutia krahnii Rausch
• Sulcorebutia steinbachii var. krahnii Gertel
• Sulcorebutia tiraquensis subs. krahnii (Rausch) Gertel & J.de Vries
• Weingartia krahnii (Rausch) F.H.Brandt
• Weingartia tiraquensis var. krahnii (Rausch) Hentzschel & K.Augustin
• Sulcorebutia lepida F.Ritter
• Sulcorebutia steinbachii var. lepida Gertel
• Sulcorebutia tiraquensis var. lepida (F.Ritter) K.Augustin & Gertel in K.Augustin, Gertel & Hentzschel
• Sulcorebutia totorensis var. lepida (F.Ritter) Donald ex Pilbeam
• Weingartia lepida (F.Ritter) F.H.Brandt
• Weingartia tiraquensis var. lepida (F.Ritter) Hentzschel & K.Augustin
• Sulcorebutia mariana Swoboda
• Sulcorebutia tiraquensis subs. mariana (Swoboda) Gertel & J.de Vries
• Weingartia mariana (Swoboda) Hentzschel & K.Augustin
• Sulcorebutia mizquensis Rausch
• Aylostera epizanaensis hort.
• Rebutia brunescens mizquensis (Rausch) hort., Kníže
• Rebutia mizquensis (Rausch) hort.
• Sulcorebutia steinbachii subs. markusii var. mizquensis (Rausch) Fritz, Gertel & J.de Vries
• Sulcorebutia steinbachii var. mizquensis (Rausch) Gertel & J.de Vries
• Weingartia markusii var. mizquensis (Rausch) Hentzschel & K.Augustin
• Weingartia mizquensis (Rausch) F.H.Brandt
• Sulcorebutia nigrofuscata (F.H.Brandt) Pilbeam
• Weingartia nigro-fuscata F.H.Brandt
• Sulcorebutia oenantha Rausch
• Sulcorebutia steinbachii subvar. oenantha Gertel
• Sulcorebutia tiraquensis var. oenantha (Rausch) Gertel & J.de Vries
• Weingartia oenantha (Rausch) F.H.Brandt
• Sulcorebutia pampagrandensis Rausch
• Sulcorebutia oenantha var. pampagrandensis (Rausch) K.Augustin & Gertel in K.Augustin, Gertel & Hentzschel
• Sulcorebutia steinbachii var. pampagrandensis Gertel
• Sulcorebutia tiraquensis var. pampagrandensis (Rausch) Hentzschel & K.Augustin
• Sulcorebutia torotorensis var. pampagrandensis (Horáček)
• Sulcorebutia weingartioides F.Ritter
• Weingartia pampagrandensis (Rausch) F.H.Brandt
• Sulcorebutia seinoiana hort.
• Sulcorebutia steinbachii var. australis Rausch
• Sulcorebutia steinbachii subs. australis Gertel
• Sulcorebutia tiraquensis var. australis (Rausch) Gertel & J.de Vries
• Sulcorebutia steinbachii f. bicolorispina Gertel
• Rebutia bicolorispina Kníže
• Rebutia tiraquensis var. bicolorispina Kníže
• Sulcorebutia tiraquensis var. bicolorispina Kníže in K. H. Brinkmann
• Sulcorebutia steinbachii var. horrida Rausch
• Weingartia backebergiana F.H.Brandt
• Weingartia steinbachii var. horrida (Rausch) Hentzschel & K.Augustin
• Sulcorebutia steinbachii subs. markusii (Rausch) Gertel & J.de Vries
• Rebutia mentosa subs. mentosa D.R.Hunt
• Sulcorebutia markusii Rausch
• Sulcorebutia markusii var. longispina Rausch, n.n.
• Sulcorebutia steinbachii var. markusii (Rausch) Gertel & J.de Vries
• Weingartia markusii (Rausch) F.H.Brandt
• Weingartia steinbachii subs. markusii (Rausch) Gertel & J.de Vries
• Sulcorebutia taratensis var. minima Rausch
• Sulcorebutia minima hort. sensu F.H.Brandt
• Sulcorebutia verticillacantha var. minima (Rausch) Pilbeam
• Weingartia minima (Rausch) F.H.Brandt
• Sulcorebutia tiraquensis var. aglaia (F.H.Brandt) Šída
• Weingartia aglaia F.H.Brandt
• Sulcorebutia totoralensis (F.H.Brandt) Pilbeam
• Weingartia ansaldoensis F.H.Brandt

• Rebutia steinbachii subs. kruegerae (Cárdenas) D.R.Hunt
• Aylostera krugerae Cárdenas
• Rebutia krugerae (Cárdenas) Backeb.
• Sulcorebutia krugerae (Cárdenas) F.Ritter
• Sulcorebutia steinbachii subs. krugerae (Cárdenas) Fritz, Gertel & J.de Vries
• Weingartia krugerae (Cárdenas) F.H.Brandt
• Weingartia steinbachii subs. krugerae (Cárdenas) Hentzschel & K.Augustin

• Rebutia steinbachii subs. tiraquensis (Cárdenas) D.R.Hunt
• Rebutia tiraquensis Cárdenas
• Sulcorebutia steinbachii subs. tiraquensis Gertel
• Sulcorebutia tiraquensis (Cárdenas) F.Ritter
• Rebutia steinbachii subv. aguilari Gertel
• Rebutia tiraquensis var. aguilarii K.Augustin & Gertel
• Rebutia tiraquensis subs. tiraquensis var. aguilarii Fritz, Gertel, J.de Vries
• Sulcorebutia tiraquensis var. aguilarii K.Augustin & Gertel
• Weingartia tiraquensis var. aguilarii (K.Augustin & Gertel) Hentzschel & K.Augustin

• Rebutia steinbachii cv. bicolor
• Sulcorebutia bicolor hort.
• Sulcorebutia glomerispina var. bicolor hort., Kníže
• Sulcorebutia steinbachii cv. Bicolor hort.
• Rebutia steinbachii cv. epizanensis
• Sulcorebutia epizanensis hort.

Description: Rebutia steinbachiiSN|11512]]SN|5221]] subv. aguilari best known as SulcoSN'>11517' alt='5221'>Rebutia tiraquensis var. aguilarii#SN#11510'>Sulco[[Rebutia tiraquensis var. aguilariiSN' style='border:none;'> is one of the innumerable local form of the very variable Rebutia steinbachiiSN|5221]]SN|5221]] (= SulcoSN'>5220' alt='11510'>Rebutia steinbachii#SN#5221'>Sulco[[Rebutia steinbachiiSN' style='border:none;'>) It is often referred as form of SulcoSN'>12577' alt='5221'>Rebutia tiraquensis#SN#11512'>Sulco[[Rebutia tiraquensisSN' style='border:none;'> with attractive mahogany red spines, dark purple bodies and rings of light purple flowers in spring.
Habit: It is solitary or few branched, but readily forming, clusters or cushions in cultivation.
Roots: Mostly non-succulent, fibrous roots. More than 90% of the plant is concentrated in the stem.
Stem: Single heads 30–50 (or more) mm wide, soft globular, flattened and somehow apically depressed, very dark magenta-green., almost hidden under the covering of spines.
Ribs: 12-26 , spiralling, forming oblong rhomboid tubercles with well-defined grooves.
Tubercles: Conical conspicuous.
Areoles: White or yellowish, long, narrow 3-6 long, 1,5-2 mm large.
Spines: Dense, erect, thin, bristle-like and flexible, reddish to mahogany red, often more than 20 (15-40)
Flowers: Bright pink to light purple, numerous in a ring at the base of the plant.
Blooming season: Spring (April - May) and remain open for up to five days.

Notes: Sulcorebutia steinbachiiSN|31363]]SN|5220]] is one of the most variable cactus species. The colour of the flower, the spines length, the body shape and pigmentation is extremely variable, even within a population. There are also many localized phenotypes capable of maintaining their separate identity, even though only a few kilometers apart and by former authors considered as separated species and varieties. They are nowadays considered just phenotypes of a highly polymorphic specie. These subpopulations are not only morphologically based but also geographically and can be grouped as follow:

Group 1a: Cochabamba to Chapare, northward and eastward to Tiraque
* Sulcorebutia glomerispinaSN|15225]]SN|5318]]
* Sulcorebutia arenaceaSN|15057]]ha
* Sulcorebutia polymorphaS. kruegeri
* Sulcorebutia hoffmannianaSN|5191]]SN|15095]]S. glanduliflora Card. n.n.
* Sulcorebutia cochabambinaSN|15096]]SN|5290]]
* Sulcorebutia steinbachiiSN|15097]]SN|5220]] & vars. australis, gracilior, etc.A

Group 1b: Province Tiraque to Epizana an eastward to Comarapa, 2,800 m-3.000 m.
* Sulcorebutia tiraquensis & vars. longiseta
* Sulcorebutia spinosior & aglaia (bicolorispina)
* Sulcorebutia lepidaSN|5220]]SN|15097]]
* Sulcorebutia krahniiSN|5290]]SN|15096]]

Group 2: Cerro Tunari-south and east of Cochabamba-Izata to Anzaldo, 3,400-3,900 m
* Sulcorebutia verticillacanthaSN|15095]]SN|5191]]
* Sulcorebutia tunariensis
* S. taratensis & var. minima
* S. mizquensis
* S. pojoniensis Rausch n.n.A

Group 3: West of Cochabamba-Ayopaya, 2,000-2,500 m
* Sulcorebutia arenaceaSN|15057]]
* S. candiae
* S. menesesii & vars. kamiensis
* S. muschii
* S. glomeriseta

Group 4: Around Totora and southward toward Epizana, 2,600-3,000 m
* Sulcorebutia oenanthaSN|5318]]SN|15225]]A
* S. totorensis
* S. pampagrandensis

Group 5: A limited area around Pasopaya and eastwards, 2,000 m
* Sulcorebutia cardenasianaSN|5220]]SN|31363]]
* S. langeri

Bibliography: Major references and further lectures
1) 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
2) David Hunt, Nigel Taylor “The New Cactus Lexicon” DH Books, 2006 ISBN 0953813444, 9780953813445
3) Edward F. Anderson “The Cactus Family” Timber Press, 2001
4) John Pilbeam “Sulcorebutia and Weingartia: A Collector's Guide” Timber Press, 1985
5) Cyril Marsden, Herbert Spencer Jackson “Rebutia, Including Aylostera and Sulcorebutia” Macmillan, 1968

Cultivation and Propagation: They are easy plant that grow large clumps and form beautiful specimens with time. During the summer it is best to keep the plants outside where the temperature can rise to over 30 C with no harm to the plant. It loves a very permeable, coarse mineral soil. From March onwards the plant will begin to grow and watering should be increased gradually until late May when the plant should be in full growth. Water regularly during the summer so long as the plant pot is allowed to drain and not sit in a tray of water. During hot weather you may need to water the plants more frequently so long as the plant is actively growing. From late September watering should be reduced to force the plant to go in to a state of semi dormancy, by October you should be back in to the winter watering regime . From November to march they must be kept strictly dry since they are very sensitive to any moisture excesses.
To prevent rottenness it is also advisable to surround its root neck by very rough sand or grit, this help a fast water drainage and an appropriate air circulation. For its sensitive roots this species is often grafted to avoid root problems.
Plants are and quite frost hardy -10 (or possibly colder)° C but preferably overwinter in a cool place (at 0/10°C) this is important for the flowers as well as for plants health. Without this cool winter period they normally wont get any buds. Sun Exposure: Need full sun avoiding only the harshest summer sun, if kept too dark they may become overly lush and greener and could be prone to rotting due to over watering. Feeding may not be necessary at all if the compost is fresh then, feed in summer only if the plant hasn't been repotted recently. Do not feed the plants from September onwards as this can cause lush growth which can be fatal during the darker cold months.Propagation: : Seed, cutting, grafting.