Origin and Habitat: Vacas, Cochabamba, Bolivia.
Altitude: 3400 meters above sea level.

• Sulcorebutia steinbachii var. horrida Rausch
• Weingartia backebergiana F.H.Brandt
• Weingartia steinbachii var. horrida (Rausch) 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: SulcoSN'>5220' alt='5221'>Rebutia steinbachii#SN#5221'>Sulco[[Rebutia steinbachiiSN' style='border:none;'> var. horrida is one of the innumerable local form of the very variable Rebutia steinbachiiSN|5221]]SN|5221]] (= SulcoSN'>5220' alt='5221'>Rebutia steinbachii#SN#5221'>Sulco[[Rebutia steinbachiiSN' style='border:none;'>) that distinguishes for its strong dark brown protruding spines and very dark bodies.
Habit: It is a clustering species (rarely solitary) readily forming, especially in cultivation, clusters or cushions up to 30 cm (or more) in diameter.
Root: Carrot-like.
Stem: Single heads 30–50 mm (or more) wide, flattened-globose or globose and somehow apically depressed, very dark tanned green or bluish-black.
Ribs: 12-26 , spiralling, forming oblong rhomboid tubercles with well-defined grooves.
Tubercles: Conical conspicuous.
Areoles: White, narrow 3-6 long, 1,5-2 mm large.
Spines: Strong, protruding, dark brown and then brown.
Central spines: 1-2 firm, often very long, vertical and noticeably stronger than the radials.
Flowers: Rarely more than 3,5 cm long and 4,5 in diameter, mauve to dark magenta with a silky sheen (occasionally yellow with reddish tones on the outside), numerous in a ring at the base of the plant.
Blooming season: Spring (April - May) and remain open for up to five days.

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: Sulcorebutias are summer grower species easy to cultivate, more cold tolerant than most. These mountainous plants have thick taproots and are susceptible to overwatering. They requires also an appropriate air circulation and are sometime grafted to avoid root problems.
Growth rate: It is a relatively rapidly growing and easily flowering species that will make clumps given the best conditions.
Soils: It likes very coarse mineral cactus mix soil, but can become too elongated if compost is too rich.
Repotting: Use pot with good drainage.
Watering: Water moderately from Spring to Autumn, but do not overwater (Rot prone), it must be strictly kept dry throughout the winter quiescent period since it is very sensitive to any moisture excesses keep dry in winter.
Fertilization: Feed with a high potassium fertilizer in summer.
Hardiness: They need to be kept in a cool place during winter rest and are somewhat resistant to frost if kept on the dry side prior to, and during, cold weather (due to the altitude they are hardy to -7 C ° C, or less for short periods). The cold is important for the flowers, as well as for their health. Without this cool winter period, they normally won't get any buds.
Exposition: Requires full sun or light shade and careful watering to keep plant compact with strong coloured spines. Tends to bronze in strong light, which encourages flowering and heavy spine production. Light shadow my be useful in the hottest summer days.
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 infested 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.
- Sciara Flies: Sciara flies are one of the major problems for seedlings. It is a good practice to mulch your seedlings with a layer of grit, which will strongly discourage the flies.
- Scales: Scales are rarely a problem.
It is wise to treat your whole collection with a systemic insecticide twice a year in spring and autumn.
- Rot: Rot is only a minor problem with cacti if the plants are watered and “aired” correctly. If they are not, fungicides won't help all that much. To prevent rottenness it is also advisable to surround its root neck by very rough sand or grit, this help a fast water drainage.
Propagation: Seed, cutting, grafting. 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!