Rebuta Stenbach Werdermann 1931

Sulcorebutia steinbachii (Werdermann) Backeberg 1951, Weingartia steinbachii (Werdermann) F. H. Brandt 1977 Aylostera kruegeri Cárdenas 1957, Rebutía krueger¡( Cárdenas) Backeberg 1959, Sulcorebutia kruegeri (Cárdenas) F. Ritter 1961, Weingartia kruegeri (Cárdenas) F. H. Brandt 1977, R. steinbachii subsp. kruegeri (Cárdenas) D. R. Hunt 1997 Rebutía tiraquensís Cárdenas 1957, Sulcorebutia tiraquensis (Cárdenas) F. Ritter 1961, Weingartia tiraquensis (Cárdenas) F. H. Brandt 1977; S. steinbachii subsp. tiraquensis (Cárdenas) Gertel 1996, not validly published; R. steinbachii subsp. tiraquensis (Cárdenas) D. R.Hunt 1997

Rebutía totorensis Cárdenas 1957, Sulcorebutia totorensis (Cárdenas)

F. Ritter 1961, Weingartia totorensis (Cárdenas) F. H. Brandt 1979 Lobivia hoffmanniana Backeberg 1959, not validly published; Sulcorebutia hoffmanniana (Backeberg) Backeberg 1966, not validly pub-

Rebutia spegazziniana

Rebutía steinbachii subsp. verticillacantha

610 Rebutía steinbachii lished; Weingartia hoffmanniana (Backeberg) F. H. Brandt 1980, not validly published Sulcorebutia lepida F. Ritter 1962, Weingartia lepida (F. Ritter) F. H. Brandt 1980

Sulcorebutia verticillacantha F. Ritter 1962, Weingartia verticillacantha (F. Ritter) F. H. Brandt 1977, Rebutía steinbachii subsp. verticillacantha (F. Ritter) Donald ex D. R. Hunt 1997 Sulcorebutia electracantha Backeberg 1963, Weingartia electracan-

tha (Backeberg) F. H. Brandt 1982 Rebutía glomerispina Cárdenas 1964, Sulcorebutia glomerispina (Cárdenas) Backeberg 1966, Weingartia glomerispina (Cárdenas) F. H. Brandt 1978

Rebutía taratensis Cárdenas 1964, Sulcorebutia taratensis (Cárdenas) Burning & Donald 1965, Weingartia taratensis (Cárdenas) F. H. Brandt 1977

Rebutía tunariensis Cárdenas. 1964, Sulcorebutia tunariensis (Cárdenas) Burning & Donald 1965, Weingartia tunariensis (Cárdenas) F. H. Brandt 1978

Rebutía polymorpha Cárdenas 1965, Sulcorebutia polymorpha (Cárdenas) Backeberg 1966, Weingartia polymorpha (Cárdenas) F. H. Brandt 1977

Sulcorebutia taratensis vat. minima Rausch 1968, Weingartia minima

(Rausch) F. H. Brandt 1986 Rebutía vizcarrae Cárdenas 1970, Sulcorebutia vizcarrae (Cárdenas)

Donald 1971, Weingartia vizcarrae (Cárdenas) F. H. Brandt 1984 Sulcorebutia krahnii Rausch 1970, Weingartia krahnii (Rausch)

F. H. Brandt 1978 Sulcorebutia mizquensis Rausch 1970, Weingartia mizquensis

(Rausch) F. H. Brandt 1979 Rebutía tubercuiato-chrysantha Cárdenas 1971, Sulcorebutia tubercu-lato-chrysantha (Cárdenas) Brederoo & Donald 1973, Weingartia tubercuiato-chrysantha (Cárdenas) F. H. Brandt 1980 Sulcorebutia oenantha Rausch 1971, Weingartia oenantha (Rausch) F.H.Brandt 1979

Sulcorebutia pampagrandensis Rausch 1974, Weingartia pampagran-

densis (Rausch) F. H. Brandt 1979 Weingartia backebergiana F. H. Brandt 1977 Weingartia aglaia F. H. Brandt 1978

Weingartia nigrofuscata F. H. Brandt 1978, Sulcorebutia nigrofuscata

(F.H.Brandt) Pi I beam 1985 Weingartia clavata F. H. Brandt 1979, Sulcorebutia clavata (F. H.

Brandt) Pilbeam 1985 Weingartia totoralensis F. H. Brandt 1982, Sulcorebutia totoralensis

(F. H. Brandt) Pilbeam 1985 Weingartia croceareolata F. H. Brandt 1984, Sulcorebutia croceareo-

lata (F. H. Brandt) Pilbeam 1985 Sulcorebutia cochabambina Rausch 1985 Weingartia ansaldoensis F. H. Brandt 1985 Sulcorebutia steinbachii var. australis Rausch 1986 Sulcorebutia mariana Swoboda 1989

Plants usually forming dense clusters. Stems flattened globose, green. Ribs 12-26, indistinct, forming oblong rhomboid tubercles with well-defined grooves. Areoles elongate, white. Spines often absent from new areoles, slow to develop, slightly curved, white or yellow, with dark tips. Central spines 1-3, sometimes absent, stout, gray, becoming whitish with age, 1-2 cm (0.4-0.8 in) long. Radial spines 6-25, usually thin, whitish, some occasionally blackish, to 2.5 cm (1 in) long. Flowers scarlet, to 3.5 cm (1.4 in) long. Fruits green. Distribution: eastern Bolivia.

Four subspecies are recognized in the variable Rebutía steinbachii. Subspecies steinbachii has as many as 13 poorly distinguished ribs, 1-3 central spines, and 6-8 radials; it occurs near Colomi, Chaparé province, Cochabamba department. Subspecies kruegerihas 10-20 ribs, 1-2 central spines, and 20-25 radials; it occurs north of Cochabamba in El Cercado province. Subspecies tiraquensis has 13-26 spiraling ribs, 1-2 central spines, and 12-13 radials; it occurs between Cochabamba, Cochabamba department, and Santa Cruz, Carrasco province, Santa Cruz department. Subspecies verticillacantha has 13-21 spiraling ribs, no central spines, and 1214 radials; it occurs near Arque, Cochabamba department.

Rebutía Steinmannii (Solms) Britton & Rose 1922 Echinocactus steinmannii Solms 1907, Lobivia steinmannii (Solms) Backeberg 1934, Mediolobivia steinmannii (Solms) Krainz 1947, Aylostera steinmannii (Solms) Backeberg 1959 Rebutía cos tata Werdermann 1934, Digitorebutia costata (Werdermann) Buining 1940, Mediolobivia costata (Werdermann) Krainz 1947

Lobivia eucaliptana Backeberg 1935, Mediolobivia eucaliptana (Backeberg) Krainz 1947, Rebutía eucaliptana F. Ritter 1980 Lobivia brachyantha Wessner 1937, Digitorebutia brachyantha (Wess-ner) Buining 1940, Mediolobivia brachyantha (Wessner) Krainz 1947, Rebutía brachyantha (Wessner) Buining & Donald 1963 Rebutía christinae Rausch 1975 Rebutía cincinnata Rausch 1975 Rebutía camargoensis Rausch 1976 Rebutía brunneoradicata F. Ritter 1977

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Rebutía poecilantha F. Ritter 1977 Rebutía potosina F. Ritter 1977 Rebutía rauscWi Zecher 1977

Lobivia steinmannii var. applanata Rausch 1987, Rebutía applanata

(Rausch) Sida 1997 Lobivia steinmannii var. leucacantha Rausch 1987, Rebutía leucacan-

tha (Rausch) Sida 1997 Lobivia steinmannii var. major Rausch 1987, Rebutía major (Rausch) Sida 1997

Lobivia steinmannii var. melanocentra Rausch 1987, Rebutía melano-

centra (Rausch) Sida 1997 Lobivia steinmannii var. parvuia Rausch 1987, Rebutía parvula

(Rausch) Sida 1997 Lobivia steinmannii var. tubercuiata Rausch 1987, Rebutía tubercuiata (Rausch) Sida 1997

Plants usually forming clusters. Stems globose to short cylindrical, to 2 cm (0.8 in) or more high, 1-3.5 cm (0.4-1.4 in) in diameter. Ribs about 8-10, spiraling, forming low tubercles. Areoles oval, brownish to whitish. Spines 8-13, needle-like, thin, flexible, erect, often intertwining, yellowish white, 3-10 mm (to 0.4 in) long. Central spines absent. Flowers borne near the stem bases, bell shaped, bright red to violet, to 2 cm (0.8 in) long and in diameter. Distribution: Bolivia. Rebutía steinmannii has received numerous names because of its variability.

Rebutía wessneriana Bewerunge 1948 Rebutía calliantha Bewerunge 1948

Rebutía calliantha var. beryllioides Buining & Donald 1963, not validly published; R. wessneriana subsp. beryllioides (Buining & Donald) Donald 1976

Plants freely forming clusters. Stems depressed globose, bright green, lacking spines apically, to 7 cm (2.8 in) high and 8 cm (3.1 in) in diameter. Ribs spiraling, not always com

pletely divided into tubercles, tubercles hexagonal when present. Areoles elliptical, white. Spines about 25, stiff, bristle-like, interlacing. Flowers borne on sides of stems, blood-red with yellowish throats, to 5.5 cm (2.2 in) in diameter. Fruits globose, dull reddish violet, 5-7 mm (0.2-0.3 in) in diameter. Distribution: northern Argentina.

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