Notocactus rauschliVliet 1969, not Parodia rauschii Backebergex D.
R. Hunt 1997 (see P. aureicentra) Notocactus spinibarbis F. Ritter 1979
Plants solitary, globose to short cylindrical, blue-green, to 21 cm (8.3 in) high and 16 cm (6.3 in) in diameter, with dense wool and spines covering the stem tips. Ribs 20-28, forming humps with chinlike protrusions. Areoles woolly at first, later naked. Central spines as many as 4, sometimes difficult to distinguish from radials, tending to point downward, black to light rose, to 22 mm (0.9 in) long. Radial spines as many as 15, with a starlike appearance, white to pale rose, to 8 mm (0.3 in) long. Flowers often closely packed apically, glossy citron yellow, to 3.5 cm (1.4 in) long and 5 cm (2 in) in diameter; pericarpels and floral tubes covered with dense white and light brown wool. Fruits elongate, thin walled, green, dehiscent, covered with white wool. Seeds bell shaped, black. Distribution: Uruguay.
Parodia ocampoi Cárdenas 1955 Parodia compressa F. Ritter 1962 Parodia punae Cárdenas 1970 Parodia gibbulosoides F. H. Brandt 1971 Parodia exquisita F. H. Brandt 1978 Parodia zecheri R. Vásquez 1978 Parodia gibbulosa F. Ritter 1980 Parodia minuta F. Ritter 1980
Parodia elachista F. H. Brandt 1981; P. zecherisubsp. elachista (F. H.
Brandt) F. H. Brandt 1988, not validly published Parodia augustM Weskamp 1997 Parodia copavilquensis Weskamp 1997
Plants forming cushions to 40 cm (16 in) wide. Stems short cylindrical, dark green, 3-7 cm (1.2-2.8 in) high, 4-6 cm (1.6-2.4 in) in diameter. Ribs 17, acute, straight. Areoles gray. Spines reddish to light brown, becoming gray with age. Cen tral spine one, short, 4-5 mm long. Radial spines 8-9, radiating, 4-10 mm (to 0.4 in) long. Flowers golden yellow, to 3 cm (1.2 in) long; pericarpels and floral tubes with whitish wool and brown hairs. Fruits not known. Distribution: Co-chabamba, Bolivia.
Parodia ottonis (Lehmann) N. P. Taylor 1987 Cactus ottonis Lehmann 1827, Echinocactus ottonis (Lehmann) Link & Otto 1830, Malacocarpus ottonis (Lehmann) Britton & Rose 1922, Notocactus ottonis (Lehmann) A. Berger 1929 Echinocactus tenuispinus link & Otto 1827, Notocactus tenuispinus
(Link & Otto) Herter 1955 Echinocactus arechavaletae Spegazzini 1905, Malacocarpus arechavaletae (Spegazzini) A. Berger 1929, Notocactus arechavaletae (Spegazzini) Herter 1943 Echinocactus ottonis var. uruguayus Arechavaleta 1905, Notocactus uruguayus (Arechavaleta) Herter 1943 Parodia paraguayensis Spegazzini 1923 Notocactus acutus F. Ritter 1979
Notocactus arechavaletae var. horstii F. Ritter 1979, Parodia ottonis subsp. horstii (F. Ritter) Hofacker 1998 Notocactus grandiensis S. Bergner 1989, not validly published ? Notocactus ruoffil N. Gerloff 1993
Plants solitary at first, later forming clumps. Stems globose, often tapering toward bases, light or dark green or blue-green, 3-15 cm (1.2-5.9 in) in diameter, with white wool apically. Ribs 6-16, well defined, rounded or acute. Areoles usually few. Spines hairlike, straight, curved or twisted. Central spines 1-4, brownish, reddish brown or yellowish, 8-40 mm (0.3-1.6 in) long. Radial spines 4-15, whitish to yellowish to brownish, 5-30 mm (0.2-1.2 in) long. Flowers usually yellow, rarely orange-red, 5-6 cm (2-2.4 in) long; floral tubes with brownish wool and bristles. Fruits ovoid to short cylindrical, thick walled, dehiscent, 0.9-1.2 cm (0.4-0.5 in) in diameter, often with large numbers of seeds. Seeds bell shaped, glossy
550 Parodia ottonis black, strongly tuberculate. Distribution: northeastern Argentina, southern Paraguay, Uruguay, and southern Brazil.
Parodia ottonis is a widespread and variable species, accounting for the many names it has received. Two subspecies are recognized. Subspecies ottonis has stems rarely exceeding 6 cm (2.4 in) in diameter, only 10 ribs, and 3-4 central spines; it occurs widely in southern Brazil, Uruguay, and Argentina. Subspecies horstii has stems often to 15 cm (5.9 in) in diameter, 12-16 ribs, and 1-4 central spines; it occurs in Rio Grande do Sul, Brazil.
Parodia oxycostata (Buining & Brederoo) Hofacker 1998 Notocactus oxycostatus Buining & Brederoo 1973 Notocactus campestrensis F. Ritter 1979 Notocactus glaucinus F. Ritter 1979
Notocactus glaucinusvar. gracilis F. Ritter 1979, A/, gracilis W. Gemm-rich 1996, Parodia oxycostata subsp.gracilis (F. Ritter) Hofacker 1998
Notocactus harmonianus F. Ritter 1979
Notocactus securituberculatus F. Ritter 1979
Notocactus securituberculatus var. miniatispinus F. Ritter 1979,
N. miniatispinus (F. Ritter) Havlicek 1989 Notocactus ibicuiensis Prestle 1985 Notocactus incomptus N. Gerloff 1990 Notocactus eurypleurus Prestle 1992, not validly published
Plants solitary, only rarely offsetting into small clusters, flattened globose to globose, gray-green, to 9 cm (3.5 in) high and in diameter. Ribs 6-12, acute, with chinlike protrusions between the areoles. Areoles round, white at first, later gray, then naked. Spines reddish brown to bright yellow, becoming lighter with age, flattened, twisted. Central spine one, usually pointing downward, to 20 mm (0.8 in) long. Radial spines usually only 2, one pointing downward, 16-25 mm (0.6-1 in) long, sometimes with as many as 8 additional
small spines to 6 mm (0.2 in) long. Flowers bell shaped to sometimes urn shaped, yellow, to 1 cm (0.4 in) long and 4.5 cm (1.8 in) in diameter; pericarpels and floral tubes with scales, white wool, and reddish brown bristles in clusters. Fruits with yellowish gray wool and reddish brown bristles, 2.5-2.7 cm (1-1.1 in) long. Seeds helmet shaped, shiny black. Distribution: Rio Grande do Sul, Brazil.
Two subspecies of Parodia oxycostata are recognized. Subspecies oxycostata has 6-7 ribs and reddish brown spines; it occurs east of Sao Gabriel. Subspecies gracilis has 9-12 ribs and bright yellow spines; it occurs near Santiago.
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