102 THE CACTACEAE. 



10. OROYA gen. nov. 



Plants solitary, depressed-globose, low-ribbed; areoles elongated, narrow; spines widely spread- 

 ing; 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). 



Echinocactus peruvianus 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: Bliihende Kakteen 2: pi. 88; Monatsschr. Kakteenk. 15: 191, as Echino- 

 cactus peruvianus. 



DESCRIBED SPECIES, PERHAPS OF THIS GENUS. 



Echinocactus aurantiacus Vaupel, Bot. Jahrb. Engler 50: Beibl. 111:23. I 9 I 3- 



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 sub- 

 central 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. 



11. MATUCANA gen. nov. 



Usually simple, small and globular, rarely elongated; ribs numerous, broad, low, somewhat 

 tubercled; areoles approximate, very woolly when young, with numerous acicular or bristly spines; 

 flower slender, tubular, scarlet, with a narrow limb; scales on the ovary and flower-tube scattered, 

 naked in their axils ; fruit not known. 



Type species: Echinocactus haynei Otto. 



The genus as known to us consists of one species, confined to the high mountains of 

 central Peru. The generic name is that of the small village in central Peru near which 

 the type species grows. 



1. Matucana haynei (Otto). 



Echinocactus haynii Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 165. 1850. 

 Cereus hayni Croucher, Garden 13: 290. 1878. 



Stems generally single, usually globular but sometimes short-cylindric, normally S to 10 cm. 

 in diameter but in cultivation sometimes 30 cm. high, densely covered and nearly concealed under 

 the numerous spines; ribs 25 or more, tuberculate; areoles set closely together, with an abundance of 

 wool when young, but without any when old; spines numerous, long and weak, the stouter ones 

 pungent, up to 3.5 cm. long, usually gray with dark or blackish tips; flower with a long slender tube, 

 6 to 7 cm. long; stigma-lobes green; scales on ovary and tube few, small, ovate. 



