Opuntia puberula Pfeiffer 1837

nopal de culebra, nopal de tortuga Opuntia maxoni J. G. Ortega 1929 Opuntia heliae Matuda 1955

Opuntia scheinvariana Paniagua 1980, not validly published

Plants shrubby, low growing. Stem segments mostly ovate, green, pubescent, thick, 7.5-12.5 cm (3-4.9 in) long, 5-7.5 cm (2-3 in) wide. Leaves tipped reddish, falling away early, to 4 mm long. Areoles with reddish spots, somewhat far apart. Glochids short. Spines 2-4, white, diverging, to 1 cm (0.4 in) long. Flowers yellow, to 5 cm (2 in) long and in diameter. Fruits fairly small, globose, not tuberculate, pubescent, to 3 cm (1.2 in) long. Distribution: Sinaloa to the Isthmus of Tehuantepec, and from Tamaulipas to Veracruz, Mexico. Opuntia puberula appears to be closely related to O. decumbens.

Opuntia pubescens H. L. Wendland ex Pfeiffer 1837

abrojo, chile de perro, tetench0lete

Cactus nanus Kunth 1823, Opuntia nana A. P. de Candolle 1828, Platy-

opuntia nana (Kunth) F. Ritter 1980 Opuntia ieptarthra F. A. C. Weber 1904 Opuntia pascoensis Britton & Rose 1914 Opuntia pestifer Britton & Rose 1919 Opuntia hoffmannii Bravo 1930 Opuntia tayapayensis Cárdenas 1950

Plants shrubby, freely branching basally with prostrate or ascending branches, 10-80 cm (3.9-31 in) high. Stem segments cylindrical to slighdy flattened, linear oblong, readily falling away, pubescent or occasionally glabrous, light green, 10-25 cm (3.9-9.8 in) long, with evident tubercles, 1-2.5 cm (0.4-1 in) wide. Glochids yellowish brown, 1-2 mm long. Spines 17, needle-like, spreading, strongly barbed, yellowish brown to gray, 5-35 mm (0.2-1.4 in) long. Flowers light yellow, 3-5

cm (1.2-2 in) long. Fruits club shaped to obconical, green with reddish brown tint, 2.2-3.5 cm (0.9-1.4 in) long, 1-1.5 cm (0.4-0.6 in) in diameter. Distribution: Mexico, Guatemala, Ecuador, Argentina, Peru, Venezuela, Caribbean, and Bolivia.

Opuntiapumila Rose 1908 cardo, nopal cardoso, vixivixio

Plants shrubby, very low growing, nearly sprawling. Stem segments cylindrical to somewhat flattened, 6-20 cm (2.47.9 in) long, 1-1.5 cm (0.4-0.6 in) wide, with fairly prominent tubercles. Areoles small. Spines usually 2, sometimes more with age, to 3 cm (1.2 in) long. Flowers yellow, becom ing reddish, to 1.5 cm (0.6 in) long. Fruits globose, reddish, to 1.5 cm (0.6 in) long. Distribution: central Mexico.

Opuntiapusilla (Haworth) Haworth 1812

creeping cactus, little prickly pear Cactus pusillus Haworth 1803 Opuntia drummondii Graham 1846 Opuntia tracyi Britton 1911 Opuntia macateei Britton & Rose 1919 Opuntia pes-corvi J. Le Conte ex Chapman 1856

Plants shrubby, low growing, usually prostrate. Stem segments narrow, slightly flattened, smooth, light green. Leaves linear, to 6 mm (0.2 in) long, falling away early. Areoles widely separated. Spines 1-2, awl shaped, brownish to yellowish. Flowers pale yellow, large. Fruits not known. Distribution: uncertain, possibly the Caribbean.

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