Rebuta minuscula K Schumann 1895

fire crown cactus, red crown cactus, violet crown cactus Echinopsis minuscula (K. Schumann) F. A. C. Weber 1896 Rebutía senilis Backeberg 1932

Rebutía chrysacantha Backeberg 1935, R. senilis subsp. chrysacantha

(Backeberg) Donald 1975 Rebutía grandiflora Backeberg 1935, R. minuscula subsp. grandiflora

(Backeberg) Donald 1975 Rebutía violaciflora Backeberg 1935, R. minuscula subsp. violaciflora

(Backeberg) Donald 1975 Rebutía carmínea Burning 1941 Rebutía graciliflora Backeberg 1963, not validly published Rebutía kariusiana Wessner 1963

Plants forming large clusters. Stems flattened globose, dull green, to 5 cm (2 in) in diameter. Ribs 16-20 with low, distinct tubercles. Areoles very small, round to elliptical, brownish. Spines 25-30, whitish, fine, 1-3 mm long. Flowers often prolific, borne at the stem bases, bright red, to 4 cm (1.6 in) long. Fruits globose, red, to 3 mm in diameter. Distribution: northern Argentina.

Rebutía narvaecensis (Cárdenas) Donald 1973 Aylostera narvaecensis Cárdenas 1971

Plants forming clusters. Stems globose, gray-green, slightly depressed apically, 3-3.5 cm (1.2-1.4 in) high, 2.5-3.5 cm (1-1.4 in) in diameter. Ribs about 18, forming low tubercles. Areoles round, prominent, white. Spines 10-20, sometimes more, thin, needle-like, spreading, whitish, 2-3 mm long. Flowers borne on the sides of the stems, often numerous, pale rose pink, 4-4.2 cm (1.6-1.7 in) long and in diameter. Fruits not known. Distribution: Tarija, Bolivia.

Rebutía neocumingii (Backeberg) D. R. Hunt 1987 Weingartia neocumingii Backeberg 1950, Sulcorebutia neocumingii

(Backeberg) F. H. Brandt 1979 Weingartia hediniana Backeberg 1950, Sulcorebutia hediniana

(Backeberg) F. H. Brandt 1976 Weingartia pulquinensis Cárdenas 1951, Sulcorebutia pulquinensis (Cárdenas) F. H. Brandt 1976, W. neocumingii subsp. pulquinensis (Cárdenas) Donald 1980 Weingartia pulquinensis var. corroana Cárdenas 1951, W. corroana (Cárdenas) Cárdenas 1964, Rebutía corroana (Cárdenas) Cárdenas 1971, Sulcorebutia corroana (Cárdenas) Brederoo & Donald 1973 Weingartia erinacea F. Ritter 1961, Sulcorebutia erinacea (F. Ritter)

F. H. Brandt 1976 Weingartia lanata F. Ritter 1961, Sulcorebutia lanata (F. Ritter) F. H. Brandt 1976

Weingartia longigibba F. Ritter 1961, Sulcorebutia longigibba (F. Ritter) F. H. Brandt 1976, W. lanata subsp. longigibba (F. Ritter) Donald 1980 Weingartia multispina F. Ritter 1961, Sulcorebutia multispina (F. Ritter)

F.H.Brandt 1976 Weingartia riograndensis F. Ritter 1961, Sulcorebutia riograndensis (F. Ritter) F. H. Brandt 1976, W. lanata subsp. riograndensis (F. Ritter) Donald 1980, Rebutía neocumingii subsp. riograndensis (F. Ritter) D.R. Hunt 1997 Weingartia sucrensis F. Ritter 1961, Sulcorebutia sucrensis (F. Ritter) F. H. Brandt 1976, W. neocumingii subsp. sucrensis (F. Ritter) Donald 1980

Weingartia pilcomayensis Cárdenas 1964, Sulcorebutia pilcomayensis (Cárdenas) F. H. Brandt 1976, W. lanata subsp. pilcomayensis (Cárdenas) Donald 1980, Rebutía neocumingii subsp .pilcomayensis (Cárdenas) D. R. Hunt 1997 Weingartia platygona Cárdenas 1964, Sulcorebutia platygona (Cárdenas) F. H. Brandt 1976

Rebutía minuscula

Sulcorebutia neocorroana F, H. Brandt 1976 Weingartia brachygraphisa F. H. Brandt 1977 Weingartia knizei F. H. Brandt 1977

Weingartia trollii Oeser 1978, Rebutia neocumingii subsp. trollii

(Oeser)D. R.Hunt 1997 Weingartia buiningiana F. Ritter 1980 Weingartia gracilispina F. Ritter 1980 Weingartia saetosa F. H. Brandt 1980

Weingartia callecallensis F. H. Brandt 1981, Sulcorebutia callecallensis

(F. H. Brandt) Pilbeam 1985 Weingartia flavida F. H. Brandt 1981, Sulcorebutia flavida (F. H. Brandt) Pilbeam 1985

Weingartia saipinensis F. H. Brandt 1982, Rebutia neocumingii subsp.

saipinensis (F. H. Brandt) D. R. Hunt 1997 Weingartia mairanana F. H. Brandt 1983 Weingartia neglecta F. H. Brandt 1983 Weingartia mataralensis F. H. Brandt 1984 Weingartia attenuata F. H. Brandt 1985 Weingartia columnaris F. H. Brandt 1986 Weingartia miranda F. H. Brandt 1986

Plants usually solitary. Stems globose to oblong, fresh green, to 20 cm (7.9 in) high and 10 cm (3.9 in) in diameter. Ribs 16-18, spiraling, forming distinct tubercles with short chinlike protrusions. Areoles round, white, large. Central spines 2-8, brown, stout, straight, to 2 cm (0.8 in) long. Radial spines 5-24, yellowish, becoming white, to 1 cm (0.4 in) long. Flowers borne near the stem tips, golden yellow to orange to reddish yellow, to 2.5 cm (1 in) long and in diameter. Distribution: widespread in Bolivia and Peru.

Rebutia neocumingii varies widely throughout its range and has received a number of inffaspecific epithets. Five subspecies are recognized here. Subspecies neocumingii has reddish yellow flowers, 10-20 radial spines, and occurs widely throughout the range of the species. Subspecies pilcomayen-

Yellow Desert Plant
Rebutia neocumingii subsp. riograndensis

sis has golden yellow flowers, 12-15 radials, and occurs in Potosí, Bolivia. Subspecies riograndensis has only 5-10 radials and occurs in Santa Cruz, Bolivia. Subspecies saipinensis has golden yellow flowers, at least 20 radials, and occurs in Cochabamba, Bolivia. Subspecies trollii has orange flowers, 16-24 radials, and occurs in Chuquisaca, Bolivia.

Rebutía neumanniana (Werdermann) D. R. Hunt 1987 Weingartia neumanniana Werdermann 1937, Gymnocalycium neuman-nianum (Werdermann) Hutchison 1957, Sulcorebutia neumanniana (Werdermann) F. H. Brandt 1976 Weingartia kargliana Rausch 1979 Weingartia pygmaea F. Ritter 1980

Plants solitary. Stems globose, gray-green with velvety appearance, constricted at bases, to 7 cm (2.8 in) high and 5 cm (2 in) in diameter. Ribs about 14, clearly divided into round-topped, six-sided tubercles. Areoles round, white. Spines yellowish to brownish, often becoming black. Central spine one, curved upward, to 3 cm (1.2 in) long. Radial spines 6-8, stiff, spreading, to 2 cm (0.8 in) long. Flowers yellow to reddish orange, to 2.5 cm (1 in) long and in diameter. Fruits globose to ovoid, brownish. Distribution: northern Argentina.

Rebutia nigricans (Wessner) D. R. Hunt 1997 Lobivia nigricans Wessner 1940, Mediolobivia nigricans (Wessner)

Krainz 1947 Rebutia carmeniana Rausch 1978 Lobivia nigricans var. albispina Rausch 1987, Rebutia albispina (Rausch) Sida 1997

Plants solitary at first, later forming clusters. Stems short cylindrical, deep green, to 2 cm (0.8 in) in diameter and somewhat longer. Ribs 11, forming distinct conical tubercles. Central spines absent. Radial spines 8-12, pectinate, needle-like. Flowers funnelform, pink with olive green mid-veins, to 21 mm (0.8 in) long. Fruits globose, green. Distribution: Argentina.

Rebutia neumanniana, photograph by Graham Charles

Rebutía pygmaea 607

Rebutía oligacantha (F. H. Brandt) Donald ex D. R. Hunt 1997 Weingartia oligacantha F. H. Brandt 1979, Sulcorebutia oligacantha

(F. H. Brandt) Pilbeam 1985 Sulcorebutia tarijensis F. Ritter 1978, Weingartia tarijensis (F. Ritter) F. H. Brandt 1978, not Rebutía tarijensis Rausch 1975 (see R. spegazziniana)

Weingartia sanguineo-tarijensis F. H. Brandt 1980, Sulcorebutiasan-guineo-tarijensis (F. H. Brandt) Pilbeam 1985

Plants solitary or clustering, globose, dark green, 3-5 cm (1.2-2 in) in diameter. Ribs 10-16, spiraling. Areoles elongate, yellowish. Spines 9-12, 5-12 mm (0.2-0.5 in) long. Flowers carmine red, throats yellow, 2.5-3 cm (1-1.2 in) long, to 3 cm (1.2 in) in diameter. Fruits brownish green. Distribution: Tarija, Bolivia.

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