OROYA gen nov

Plants solitary, depressed-globose, low-ribbed; areoles elongated, narrow; spines widely spreading; flowers central, borne at the upper edge of the spine-areole, red to pink, short-funnelform; tube-proper very short, naked; stamens inserted on the throat of the flower, included; scales on the ovary small, bearing small tufts of hair in their axils; fruit short, clavate, glabrous.

Type species: Echinocactus peruvianus Schumann.

The generic name is that of the village in Peru in which the type species is found. 1. Oroya peruviana (Schumann).

Echinocactusperuvianus Schumann, Gesamtb. Kakteen Nachtr. 113. 1903.

Depressed and deep-seated in the ground, 10 to 14 cm. broad; ribs usually 21, low, obtuse, divided into low tubercles; areoles 8 to 12 mm. long; radial spines 18 to 20, yellowish with darker bases and reddish tips, unequal, the longer ones about 2 cm. long; central spines sometimes as many as 4, but often wanting, a little longer and stouter than the laterals and usually red in color; flowers 1.5 to 2 cm. long; outer perianth-segments acute, reddish, the inner pink, yellow at base, linear, obtuse or apiculate; style pink above; stigma-lobes pale yellow; seeds 2 mm. long, black.

Type locality: High mountains above Lima, Peru.

Distribution: High Andes of central Peru.

In 1914 Dr. Rose found this plant growing abundantly in the vicinity of Oroya, Peru, on a gravelly flat. The individual plants show only their flat tops above the surface of the soil. Opuntia floccosa was also common in the same locality.

Illustrations: Bl├╝hende Kakteen 2: pl. 88; Monatsschr. Kakteenk. 15: 191, as Echinocactus peruvianus.

DESCRIBED SPECIES, PERHAPS OF THIS GENUS. Echinocactus aurantiacus Vaupel, Bot. Jahrb. Engler 50: Beibl. 111: 23. 1913.

Simple or cespitose, subglobose; ribs about 16; areoles elliptic; spines about 25, reddish brown, unequal, about 16, spreading, about 1 cm. long, somewhat more radial than the others; the subcentral one of them 5 cm. long; flowers narrowly funnelform, 7 cm. long; fruit 1 cm. in diameter, covered with small lanceolate scales; seeds black.

Type locality: San Pablo, department of Catamarca, Peru.

Distribution: Peru.

Continue reading here: Matucana gen nov

Was this article helpful?

0 0