Opuntia affinis Griffiths Proc Biol Soc Washington 27 27 1914

"A low, arborescent species, from 125 cm. high with us at 4 years of age to 2 m. or more in its natural habitat; joints obovate, 13 by 35 cm., broadly rounded above and gradually narrowed below, densely silky, villous to the touch, and villous nature plainly visible when viewed in proper light, slightly raised at areoles, the tubercles being surrounded by a sunken dark-green line; leaves small, subulate, pointed, scarcely 2 mm. in length; areole small, obovate, 3 mm. long, 25 to 30 mm. apart, white to gray; spicules light straw-colored, at first not conspicuous but rather in a connivent tuft, 3 mm. long; spines absent below and 1 to 5 in upper five-sixths of joint, straw-colored, becoming white the second year, the longest 3 cm. and others much shorter, increasing in age in both length and

Fig. 209.—Opuntia macdougaliana, Tehuacan, Mexico.

numbers, at 3 years often 10 in number and some 6 cm. long, divergent, flattened, angular, twisted; flowers dull dark-red in bud, with stigma protruding the day before the petals spread, small, about

3 cm. in diameter when opened, petals 20 to 25 mm. long, slightly, when at all, recurved, ribs of petals red and wings orange, filaments greenish below and pink above, style bright-glossy red, stigma dull greenish red, 4-parted, equaling the petals in length; ovary small, subglobose, deeply pitted, 15 to 17 mm. in diameter, with small subcircular to slightly transversely elongated, dirty brown areoles,

4 mm. apart; fruit small, subglobose, red."

Type locality: State of Oaxaca, Mexico. Distribution: Known only from type locality.

Our examination of the type specimen of this species showed that it is closely related to Opuntia macdougaliana, differing in the color of its petals, which may not be a specific character.

Fig. 210.—Opuntia macdougaliana
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