| Opuntia filipendula, Engelm. A small, semi-prostrate plant, freely branching from the base of the joints, rarely 10 in. high and with thick, tuberous, moniliform roots: joints small and thin, bluish, glaucous, rarely 3 in. greatest diam., orbicular to broadly obovate, sometimes diamond-shaped, frequently flattened at the top and broader than long: areoles orbicular and with an abundance of whitish wool and many long, slender, yellowish green bristles, which are very conspicuous, particularly on the older joints; spines sometimes wanting, when present usually 1-3, rarely more, white, very slender and flexible 1-2 in. long, mostly marginal: fls. yellow, 1½-2 in. diam.: fr. clavate to narrowly obovate, 1½ in. long and half as wide, greenish yellow, with few seeds. Texas to Ariz., extending into Mex. | | Opuntia filipendula, Engelm. A small, semi-prostrate plant, freely branching from the base of the joints, rarely 10 in. high and with thick, tuberous, moniliform roots: joints small and thin, bluish, glaucous, rarely 3 in. greatest diam., orbicular to broadly obovate, sometimes diamond-shaped, frequently flattened at the top and broader than long: areoles orbicular and with an abundance of whitish wool and many long, slender, yellowish green bristles, which are very conspicuous, particularly on the older joints; spines sometimes wanting, when present usually 1-3, rarely more, white, very slender and flexible 1-2 in. long, mostly marginal: fls. yellow, 1½-2 in. diam.: fr. clavate to narrowly obovate, 1½ in. long and half as wide, greenish yellow, with few seeds. Texas to Ariz., extending into Mex. |