Opuntia macdougaliana Rose Smiths Misc Coll 50 516 1908

Opuntia micrarthra Griffiths, Monatsschr. Kakteenk. 23: 130. 1913.

Plant about 4 meters high, with a distinct cylindric trunk branching from near the base; joints oblong, 30 cm. long by 8 to 10 cm. broad, softly pubescent; areoles distinct, small; spines generally 4, one much longer (2.5 to 4 cm. long), somewhat flattened, yellowish, becoming whitish in age; glochids short, numerous, yellow; fruit globular to oblong, 5 cm. long, the surface divided into diamond-shaped plates, red, with a broad deep cup at apex, the numerous small rounded areoles filled with clumps of yellow glochids, very rarely, with one or two spines.

Type locality: Near Tehuacan, Mexico.

Distribution: Southern Mexico.

Figure 209 is from a photograph of the type plant taken by Dr. MacDougal at El Riego, Tehuacan, Mexico, in 1906; figure 210 represents a plant grown from a cutting of the type.

188. Opuntia velutina Weber in Gosselin, Bull. Mus. Hist. Nat. Paris 10: 389. 1904.

Opuntia nelsonii Rose, Smiths. Misc. Coll. 50: 516. 1908.

Stems 1 to 4 meters high; joints flattened, oblong to pear-shaped in outline, 15 to 20 cm. long by 10 to 15 cm. broad near the top, pubescent, pale yellowish green in herbarium specimens; areoles 2 to 3 cm. apart; spines 2 to 6, yellow, becoming white in age, very unequal, the longer ones 3 to 4 cm. long; bristles many, yellow, becoming brownish; flowers rather small; petals yellow,

1 to 3 cm. long; ovary pubescent, bearing many yellowish brown bristles; filaments red; stigmalobes pale green; fruit "dark red."

Type locality: In Guerrero, Mexico.

Distribution: Southern Mexico.

Plate xxxii, figure 3, represents a flowering joint of a plant collected at Tehuacan, Mexico, by Dr. MacDougal and Dr. Rose in 1906.

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