Opuntia subsphaerocarpa Spegazzini 1925

Plants shrubby to nearly treelike, densely branched. Stem segments oval to somewhat elongate, glossy dark green, to 20 cm (7.9 in) long and 5.5 cm (2.2 in) wide. Spines 1-2, often absent, whitish, 1.5-2.5 cm (0.6-1 in) long. Flowers yellow, to 5 cm (2 in) in diameter. Fruits globose, red. Distribution: Misiones, Argentina.

Opuntia sulfurea G. Don 1830 Platyopuntia sulfurea (G. Don) F. Ritter 1980 Opuntia vulpina F. A. C. Weber 1898 Opuntia brunnescens Britton & Rose 1919 Platyopuntia brachyacantha F. Ritter 1980, Opuntia brachyacantha (F. Ritter) R. Crook & Mottram 1995,0. sulfurea subsp. brachyacantha (F. Ritter) P. J. Braun & Esteves 1995 Platyopuntia spinibarbis F. Ritter 1980, Opuntia sulfurea subsp.spini-barbis (F. Ritter) P. J. Braun & Esteves 1995

Plants shrubby, low growing with several spreading branches, forming clumps to 30 cm (12 in) high and 1-2 m (3.3-6.6 ft)

Opuntia sulfurea subsp. sulfurea

Plants shrubby, low growing with several spreading branches, forming clumps to 30 cm (12 in) high and 1-2 m (3.3-6.6 ft)

wide. Stem segments oblong to obovate, flattened, strongly tuberculate, green, often with purplish tint, easily detached, 12-25 cm (4.7-9.8 in) long. Leaves conical, to 2 mm long. Areoles small, white, borne on protuberances. Glochids yellowish red. Spines 2-8, spreading, stiff, thick, straight to slightly curved, sometimes twisted, brownish to red, 3-10 cm (1.2-3.9 in) long. Flowers yellow, to 4 cm (1.6 in) long. Fruits to 1 cm (0.4 in) long. Distribution: northern Argentina and Bolivia.

Three subspecies of Opuntia sulfurea are recognized. Subspecies sulfurea has 2-8 spines and occurs in northern Argentina. Subspecies brachyacantha has 2-6 spines and occurs in Cochabamba, Bolivia. Subspecies spinibarbis has 4-8 spines and occurs in Tarija, Bolivia.

Opuntia tapona Engelmann 1896 Opuntia angustatavar. comonduensis J. M. Coulter 1896,0. comon-duensis (J. M. Coulter) Britton & Rose 1908

Plants shrubby, 0.5-1 m (20-39 in) high with several ascending or extended branches, often with short, thick, spiny trunks. Stem segments round to widely obovate, pale green, somewhat glaucous, finely but densely woolly, 15-30 cm (5.9-12 in) long, 6-18 cm (2.4-7.1 in) wide. Areoles reddish brown, widely separated. Glochids reddish, to 4 mm long. Spines 1-4, thin, bent backward, pale gray to reddish, 1-5 cm (0.4-2 in) long. Flowers light orange-yellow, 4-6 cm (1.6-2.4 in) in diameter. Fruits red, fleshy, 3.5-5 cm (1.4-2 in) long, 2-4 cm (0.8-1.6 in) in diameter. Distribution: Baja California Sur, Mexico.

Opuntia taylori Britton & Rose 1908

Plants shrubby with several prostrate and spreading branches. Stem segments linear to linear oblong, bright green, not tuberculate, glabrous or pubescent, to 12 cm (4.7 in) long, 1-2 cm (0.4-0.8 in) wide. Areoles not elevated, 1-1.5 cm (0.40.6 in) apart. Glochids yellowish brown, to 3 mm long. Spines 3-6, needle-like, yellowish brown, becoming whitish with age, to 4 cm (1.6 in) long. Flowers small, yellow. Fruits pear shaped, spineless, to 1.5 cm (0.6 in) long. Distribution: Hispaniola.

Opuntia tehuacana S. Arias & U. Guzman 1997

Plants shrubby, branching basally with ascending or prostrate branches, 40-80 cm (16-31 in) high. Stem segments more or less round to weakly obovate, green to yellowish green, glabrous, 20-29 cm (7.9-11 in) long, 23-26 cm (9.110 in) wide, with distinct tubercles. Areoles elliptical, 2.84.3 mm long, 25-35 mm (1-1.4 in) apart. Glochids 1-2 mm long. Spines 1-3, sometimes as many as 7, weakly awl-like, erect, weakly twisted, whitish gray to yellow, becoming gray with age, 1-4 cm (0.4-1.6 in) long. Flowers reddish yellow, 3-4.2 cm (1.2-1.7 in) long. Fruits obovoid, yellow, 4.55 cm (1.8-2 in) long, 2.8-3 cm (1.1-1.2 in) in diameter, with glochids. Distribution: valley of Tehuacan-Cuicatlan, Mexico.

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