Opuntia urbaniana Werdermann 1931

Plants shrubby. Stem segments linear to oblong, to 20 cm (7.9 in) long and 5.5 cm (2.2 in) wide. Glochids yellowish. Spines 1-2, needle-like, sometimes flattened and twisted, whitish at first, later yellowish, to 5 cm (2 in) long. Flowers yellow, to 7 cm (2.8 in) long. Fruits not known. Distribution: Hispaniola. Opuntia urbaniana is poorly understood.

Opuntia Xvaseyi (J. M. Coulter) Britton & Rose 1908, as a species apricot prickly pear, golden prickly pear, sprawling prickly pear

Opuntia mesacantha var. vssey/J. M. Coulter 1896 Opuntia covillei Britton & Rose 1908

Opuntia Xvaseyi is a naturally occurring hybrid, O. littoralis X O. phaeacantha. Distribution: southern California.

Opuntia velutina F. A. C. Weber 1904 Opuntia neisonii Rose 1908 Opuntia affinis Griffiths 1914

Plants shrubby to treelike with ascending branches, 1-4 m (3.3-13 ft) high with main trunks 20-80 cm (7.9-31 in)

Opuntia xwootonii 525

high. Stem segments narrowly to widely obovate, occasionally more or less round, densely pubescent, green to yellowish green, 15-26 cm (5.9-10 in) long, 14-20 cm (5.5-7.9 in) wide. Areoles white. Glochids abundant, yellowish red, 5-13 mm (0.2-0.5 in) long. Spines 2-6, weakly awl-like, straight, diverging or weakly bent backward, whitish yellow, 1-4 cm (0.4-1.6 in) long. Flowers yellow, 3-5 cm (1.2-2 in) long. Fruits globose, red, pubescent, 3-3.2 cm (1.2-1.3 in) long, 2.5-3 cm (1-1.2 in) in diameter, with glochids. Distribution: Guerrero, Morelos, Puebla, and Oaxaca, Mexico.

Opuntia viridirubra (F. Ritter) Schlindwein 1995 Platyopuntia viridirubra F. Ritter 1979

Platyopuntia rubrogemmia F. Ritter 1979, Opuntia viridirubra subsp. rubrogemmia (F. Ritter) P. J. Braun & Esteves 1995

Plants shrubby with several upright or sprawling branches, 30-40 cm (12-16 in) high. Stem segments elliptical, dark green, 6-20 cm (2.4-7.9 in) long, 2.5-4 cm (1-1.6 in) wide, to 1 cm (0.4 in) thick. Areoles white, 1.5-3 cm (0.6-1.2 in) apart. Glochids yellowish. Spines 1-3, needle-like, brownish yellow, 2-4 cm (0.8-1.6 in) long, upper one erect, lower ones bent downward. Flowers lemon yellow, 4.5-5.5 cm (1.8-2.2 in) in diameter. Fruits pear shaped, dark red, to 3.5 cm (1.4 in) long. Distribution: Rio Grande do Sul, Brazil.

Two subspecies of Opuntia viridirubra are recognized. Subspecies viridirubra has stem segments to 12 cm (4.7 in) long and 1-3 spines to 40 mm (1.6 in) long. Subspecies rubrogemmia has stem segments to 20 cm (7.9 in) long but only a few weak spines to 8 mm (0.3 in) long.

Opuntia vitelliniflora (F. Ritter) P. J. Braun 8c Esteves 1995 Platyopuntia vitelliniflora F. Ritter 1980 Platyopuntia interjecta F. Ritter 1980, Opuntia vitelliniflora subsp. interjecta (F. Ritter) P. J. Braun & Esteves 1995

Plants shrubby, low growing with several prostrate branches. Stem segments elongate, light green with dark green spots by each areole, 12-40 cm (4.7-16 in) long, 3-7 cm (1.2-2.8 in) wide, to 1 cm (0.4 in) thick. Areoles gray, slightly raised. Glochids brown, short. Spines 1-2, sometimes 3, brown, becoming whitish with age, one erect, 5-20 mm (0.2-0.8 in) long. Flowers yellowish white, to 6 cm (2.4 in) long and 5 cm (2 in) in diameter. Fruits nearly pear shaped, bright red. Distribution: Florida province, Santa Cruz, and the Gran Chaco region, Bolivia.

Two subspecies of Opuntia vitelliniflora are recognized. Subspecies vitelliniflora has stem segments to 22 cm (8.7 in) long; it occurs near Samaipata, Santa Cruz. Subspecies interjecta has stem segments to 40 cm (16 in) long; it occurs near Palmar Grande in the Gran Chaco.

Opuntia wetmorei Britton & Rose 1923

Plants shrubby, low growing, producing many branches. Stem segments more or less cylindrical, tapering toward the ends, dull green with purplish spots near areoles, turgid, 4-10 cm (1.6-3.9 in) long, to 2 cm (0.8 in) in diameter. Leaves to

2 mm long, falling away early. Areoles small, whitish or tan. Glochids short, yellowish. Spines many, unequal, bristle-like, flattened, whitish to yellowish to brownish, some bent backward, others flattened against the stem surface, some ascending, 2-3.5 cm (0.8-1.4 in) long. Flowers not known. Fruits reddish purple, with white bristles on upper areoles, to

3 cm (1.2 in) long. Distribution: Mendoza, Argentina.

Opuntia wilcoxii Britton 8c Rose 1919

Plants shrubby, forming large bushes with many branches, 1-2 m (3.3-6.6 ft) high. Stem segments oblong, thin, large, dark green with purplish tint by areoles, finely pubescent, to 20 cm (7.9 in) long. Areoles large, widely separated. Glochids numerous, long, yellow. Spines 1-3, one very long, white to somewhat yellow, to 5 cm (2 in) long. Flowers yellow, to 6 cm (2.4 in) long. Fruits pear shaped, pubescent, spineless, to

4 cm (1.6 in) long and 3 cm (1.2 in) in diameter. Distribution: Pacific coast of Mexico from Sonora to Jalisco.

Opuntia xwootonii Griffiths 1910, as a species Opuntia engelmanniiv ar. wootonii (Griffiths) Fosberg 1931,0. phaea-cantha var. wootonii (Griffiths) L. D. Benson 1969

Opuntia xwootonii is a naturally occurring hybrid, O. engel-mannii X O. phaeacantha. Distribution: New Mexico.

Opuntia Urbaniana

526 Oreocere us

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