. Carnegie Institution of Washington publication. 130. Opuntia microdisca Weber, Diet. Hort. Bois 896. 1898. FIG. 169.—Opuntia soehrensii. Forming small clumps, very much branched, prostrate; joints mostly obovate to oblong, 4 to 8 cm. long, usually much flattened, but sometimes nearly cylindric, grayish green; leaves minute, purple, soon dropping off; areoles numerous, 5 to 6 mm. apart, rather large, when young densely white-felted; spines 10 to 15, white to reddish, unequal, some of the centrals to cm. long; glochids numerous, yellow;flower-buds red; flowers cm. long, brigh
. Carnegie Institution of Washington publication. 130. Opuntia microdisca Weber, Diet. Hort. Bois 896. 1898. FIG. 169.—Opuntia soehrensii. Forming small clumps, very much branched, prostrate; joints mostly obovate to oblong, 4 to 8 cm. long, usually much flattened, but sometimes nearly cylindric, grayish green; leaves minute, purple, soon dropping off; areoles numerous, 5 to 6 mm. apart, rather large, when young densely white-felted; spines 10 to 15, white to reddish, unequal, some of the centrals to cm. long; glochids numerous, yellow;flower-buds red; flowers cm. long, bright red; filaments purple; style white; stigma-lobes 6 to 8, short; ovary turbinate, 16 mm. long, bearing numerous areoles sub- tended by narrow red leaves; areoles on ovary densely felted and bristly; fruit red. Type locality: In Catamarca, Argentina. Distribution: Northern Argentina. Schumann refers this species to Platyopuntia, while Weber referred it to Tephrocactits. It evidently belongs to our Sul- phurcac, being nearest our 0. soehrensii. Our description is drawn chiefly from specimens obtained by J. A. Shafer between Andalgala and Concepcion, Argen- tina, in 1916, supplemented by a living specimen obtained by Dr. Spegazzini in 1915. In Argentina this species also is known as ayrampo. Figure 170 represents a joint of the plant collected by J. A. Shafer between Andalgala and Concepcion, Argentina, Decem- ber 28, 1916 (No. 24). To this relationship may belong the following species: OPUNTIA PENICILLIGERA Spegazzini, Anal. Mus. Nac. Buenos Aires FI«-170.—Joint of Opuntia micro- TT disca. II. 4: 291. 1902. Low, nearly prostrate; joints flattened, orbicular to broadly obovate, 10 to 12 cm. long, 7 to 10 cm. broad, dull green; spines slender, twisted, one elongated and i to 5 cm. long, the others much shorter, all white; glochids brownish; flowers from the lateral and marginal areoles, citron-yellow;. Please note that these images are extracted from scanned page images
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