Plants forming mats with branches of three to five joints. Stem segments oblong to lance shaped to ellipsoidal, glaucous, 12-15 cm (4.7-5.7 in) long, 8-9 cm (3.1-3.5 in) wide, to 2.5 cm (1 in) thick. Areoles oblong, located on slight protuberances, whitish. Spines 1-3, needle-like, whitish, 2-4 cm (0.8-1.6 in) long. Flowers many, borne on the margins, yellow to somewhat rose, 4-5 cm (1.6-2 in) in diameter. Fruits subglobose, red, to 2 cm (0.8 in) long and in diameter. Distribution: Patagonia, Argentina.
Opuntia paraguayensis K. Schumann 1899 Opuntia bonaerensis Spegazzini 1904
Plants shrubby with many erect branches, 1-2 m (3.3-6.6 ft) high. Stem segments obovate to elliptical, light green to green, to 25 cm (9.8 in) long, 5-8.5 cm (2-3.3 in) wide. Glochids yellowish. Spine usually absent, occasionally one, yellowish. Flowers orange, to 8 cm (3.1 in) in diameter. Fruits conical, dark purple, to 7 cm (2.8 in) long. Distribution: Paraguay.
Opuntia parviclada S. Arias &S. Gama 1997
Plants shrubby, generally branching basally with branches ascending or weakly spreading, 20-50 cm (7.9-20 in) high. Stem segments weakly obovate to oblong, flattened, weakly or strongly pubescent, dark green with purplish tint around areoles, with podaria evident only on young segments; terminal segments 5-10 cm (2-3.9 in) long, 2-3 cm (0.8-1.2 in) wide; other segments 9-17 cm (3.5-6.7in) long,3.5-4 cm (1.4-1.6 in) wide. Areoles round to elliptical, 1-1.5 mm in diameter, 6-13 mm (0.2-0.5 in) apart. Glochids darkyellow, 1-1.5 mm
long. Spines 1-3, sometimes absent on older segments, needle-like, erect, white or light yellow, 0.6-3.8 cm (0.2-1.5 in) long. Flowers yellow, sometimes with reddish tint, 2.5-3.4 cm (1-1.3 in) long. Fruits obovoid to weakly obconical, red, pubescent, 1.8-2.5 cm (0.7-1 in) long, 1.2-1.7 cm (0.5-0.7 in) in diameter, with evident tubercles. Distribution: valley of Tehuacan-Cuicatlan in Puebla and Oaxaca, Mexico.
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