Opuntia streptacantha Lemaire 1839

cardón, cenizo, chaveñ0, nopal cardón, nopal hartón, tuna cardona

Plants shrubby to treelike, 2-4 m (6.6-13 ft) high with main stems to 80 cm (31 in) high and 30-40 cm (12-16 in) in diameter. Stem segments obovate to somewhat round, glabrous, green, 18-30 cm (7.1-12 in) long, 14-18 cm (5.5-7.1 in) wide. Areoles with one or two long, deciduous, dark hairs 1-2 mm long. Glochids yellowish red. Spines 3-7, awl-like, erect, lower ones flattened against the segments, whitish gray, becoming dark with age, 0.5-2 cm (0.2-0.8 in) long. Flowers yellow to orange, 6-7 cm (2.4-2.8 in) long. Fruits globose to obovoid, yellowto red, edible, 4-4.2 cm (1.6-1.7 in) long, 3.5-5 cm (1.4-2 in) in diameter, with short glochids. Distribution: widespread in Mexico in Hidalgo, Guanajuato, México, Oaxaca, Puebla, Querétaro, San Luis Potosí, Tlaxcala, and Zacatecas.

Opuntia Stricta (Haworth) Haworth 1812

coastal prickly pear, yaaxpakan Cactus strictus Haworth 1803 Opuntia macrarthra Glbbes 1859 Opuntia bahamana Britton & Rose 1919 Opuntia keyensis Britton ex Small 1919 Opuntia magnifica Small 1933

Opuntia stenopetala

Plants shrubby, sprawling to somewhat erect, 0.5-1.5 m (1.6-4.9 ft) high. Stem segments flattened, blue-green, ovate to obovate, with tapering bases, glabrous, not detaching easily, 10-25 cm (3.9-9.8 in) long, 6-15 cm (1.4-5.9 in) wide. Areoles brownish, far apart. Glochids yellow, conspicuous,

2-6 mm (to 0.2 in) long. Spines 1-5, awl shaped, flattened, yellow, slightly barbed apically, perpendicular to the surface, 0.5-5 cm (0.2-2 in) long. Flowers yellow to yellowish orange, 5-6 cm (2-2.4 in) long, 4-6 cm (1.6-2.4 in) in diameter. Fruits obovoid, with tapering bases, smooth, purplish red,

3-4 cm (1.2-1.6 in) long, 2.5-3.5 cm (1-1.4 in) in diameter, with abundant glochids. Distribution: southeastern United States, eastern Mexico, and Cuba. Opuntia stricta has been widely distributed by humans (Chapter 2, under Cacti as Weeds); some believe it is conspecific with O. dillenii.

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