branched pencil cholla, diamond cholla
Opuntia ramosissima Engelmann 1852 Opuntia tesselata Engelmann 1856
Plants shrubby or treelike, intricately branched, 0.5-2 m (1.6-6.6 ft) high. Stem segments cylindrical, firmly attached, green, becoming gray when dry, 2-10 cm (0.8-3.9 in) long,
0.4-1 cm (to 0.4 in) in diameter, with rhombic, convex tubercles. Areoles with tan to white wool, nearly round, the apical portions protruding and wedged between adjacent tubercles. Glochids yellow to brown, to 2 mm long. Spines mostly on distal areoles, 1-5, sometimes absent, tan to reddish brown to deep purple, aging gray; principal apical spines 0-2, the longest one spreading, 2.5-6 cm (1-2.4 in) long; principal basal spines mostly bent backward, to 1 cm (0.4 in) long. Flowers bronze-red with some rose tint. Fruits ellipsoidal, becoming burlike, dry, tan, 1.5-3 cm (0.6-1.2 in) long, 1-1.5 cm (0.4-0.6 in) in diameter. Distribution: Mo-jave and Sonoran Deserts of Arizona, California, and Nevada, and Baja California and Sonora, Mexico.
Cylindropuntia rosea (A. P. de Candolle) Backeberg 1958
Opuntia rosea A. P. de Candolle 1828
Opuntia pallida Rose 1908, Cylindropuntia pallida (Rose) F. M. Knuth 1935
Plants shrubby, branching basally with ascending stems, 20-50 cm (7.9-20 in) high. Stem segments cylindrical, gray-green, 10-15 cm (3.9-5.9 in) long, 1.6-2.5 cm (0.6-1 in) in diameter, with distinct tubercles. Areoles large, 2-3.5 cm (0.8-1.4 in) apart. Glochids yellow, 2-5 mm long. Spines 4-9, sometimes only one, needle-like, yellow to reddish to gray, 1-4 cm (0.4-1.6 in) long; sheaths papery, yellowish, not completely covering the spines. Flowers rose colored, 3.8-4 cm (1.5-1.6 in) long. Fruits obconical to obovoid, yellow, spiny, 1.6-1.8 cm (0.6-0.7 in) long, 1.1-1.4 cm (0.4-0.6 in) in diameter, with distinct tubercles. Distribution: Hidalgo, México, Puebla, and Tlaxcala, Mexico.
Cylindropuntia sanfelipensis (Rebman) Rebman 2001 Opuntia sanfelipensis Rebman 1998
Plants short and densely branched, to erect shrubs with more or less ascending branches, 0.5-1.5 m (1.6-4.9 ft) high. Stem segments green to gray-green, firmly attached, 8.5-15.5 cm (3.3-6.1 in) long, 2.2-3.5 cm (0.9-1.4 in) long, densely covered by stout spines, with broad to elliptical tubercles. Areoles cream, aging gray. Glochids often conspicuous, pale yellow, 2-5 mm long, several often bristle-like to 10 mm (0.4 in) long. Spines 11-27, on all areoles, light yellow, 2.1-4.4 cm (0.8—1.7 in) long. Flowers yellow-bronze to reddish magenta, sometimes mixed, female-only and female-and-male flowers (plants then gynodioecious). Fruits top shaped to barrel shaped, dry, not proliferating, densely spined and burlike, gray-green to tan or gray, 1.7-2.4 cm (0.7-0.9 in) long, 1.52.5 cm (0.6-1 in) in diameter. Distribution: San Felipe Desert, Baja California, Mexico.
Cylindropuntia santamaría (e. m. Baxter) Rebman 2001 Grusonia santamaría E. M. Baxter 1934, Opuntia santamaría (E. M. Baxter) Bravo 1972
Plants creeping or scrambling shrubs with branches not easily detached, 0.3-1 m (12-39 in) high. Stem segments gray-green or tinted yellowish or reddish, 9-15 cm (3.5-5.9 in) long, 3-4.5 cm (1.2-1.8 in) in diameter, with distinct tubercles often forming 8-9 ribs. Areoles pale yellow, becoming gray with age. Glochids inconspicuous, 1-2 mm long, often a few gray and bristle-like. Spines 20-26, on all areoles, orang-ish brown to gray or dark brown, 1.5-2.5 cm (0.6-1 in) long; sheaths white. Flowers greenish sulfur yellow with rose midribs. Fruits top shaped to barrel shaped, dry, spiny or spineless, tan to light gray, not proliferating, 1.6-2.8 cm (0.6-1.1 in) long, 1.4-2.1 cm (0.6-0.8 in) in diameter. Distribution: Magdalena Island, Baja California Sur, Mexico.
Cylindropuntia spinosior (Engelmann) F. M. Knuth 1935
cane cholla, spiny cholla
Opuntia whippieim. spinosior Engelmann 1856,0. spinosior (Engel-mann)Toumey 1898
Plants compact, treelike with whorled branches, 0.4-2 m (1.3-6.6 ft) high. Stem segments green to purplish, 5-23 cm (2-9.1 in) long, 1.3-3.5 cm (0.5-1.4 in) in diameter, with prominent oval tubercles. Areoles with yellow to tan wool, aging darker, often elliptical. Glochids inconspicuous, yellow to tan, aging gray, 1-2 mm long. Spines 4-24, on most areoles, tan to pink to reddish brown, interlacing; sheaths whitish, baggy. Flowers rose to reddish purple, bronze-purple, yellow, or whitish. Fruits broadly cylindrical, fleshy, rarely proliferating, strongly tuberculate, yellow tinged with purple, 2-5 cm (0.8-2 in) long, 1.7-3 cm (0.7-1.2 in) in diameter. Distribution: desert and grasslands in Arizona and New Mexico, and Sonora and Chihuahua, Mexico.
2-8.2 cm (0.8-3.2 in) long. Secondary spines 0-2,bent downward, without sheaths, dark brown to gray, to 3 mm long. Flowers yellow to yellowish green. Fruits dry, spineless, tan, 1.5-2.5 cm (0.6-1 in) long, 0.8-1.5 cm (0.3-0.6 in) in diameter. Distribution: San Felipe, Central, and Vizcaino Deserts of the Baja California Peninsula, Mexico.
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