COKKYOCACTUS. 



67 



some less than 1 em. long, some about 3 cm. long, and still others 20 to 24 cm. long; flower broadly 

 funnelform, constricted just above the ovary, 9 cm. long, 10 cm. broad when fully expanded; throat 

 4.5 cm. broad at the top; perianth-segments bright yellow, oblong, spreading; filaments numerous, 

 yellow; style short, thick, white, with numerous, slender, white stigma-lobes; scales of the ovary 

 and flower-tube small, with brown wool, white bristles, and short spines; fruit globular, juicy, covered 

 with numerous spine-clusters, these tardily deciduous. 



Type locality: Yura, near Arequipa, Peru. 



Distribution: In the mountains of southern Peru, altitude 2,000 to 3,300 meters. 



This species is one of the three or four common cacti found on the hills and in the valleys 

 both above and below Arequipa, and, while not the largest, is often the most abundant and 

 conspicuous. Dr. Rose studied this plant in Peru in 19 14, collecting living and herbarium 

 specimens, including the very long spines described above (Nos. 18780, 18965). 



Figure 99 is from a photograph taken near Arequipa, Peru, by T. A. Corry in 191 7; 

 figure 101 represents a flower collected by Dr. Rose near the same place in 1914. 



B - : II 



■ ' 'IB' 



.- 







Fig. 99. — Corryocactus brevistylus. Fig. 100. — Corryocactus brachy- 



petalus. 



2. Corryocactus brachypetalus (Vaupel). 



Cereus brachypetalus Vaupel, Bot. Jahrb. Engler 50: Beibl. m: 16. 1913. 



Plant 2 to 4 meters high, usually with many (sometimes 100 or more) strict branches from 

 the base, forming a top 3 to 4 meters in diameter; ribs usually 7 or 8, somewhat prominent; areoles 

 usuallv 2 cm. apart, large, 1 cm. in diameter or less, with short wool and spines; spines at first black 

 with brown bases, about 20 at an areole, very unequal, most of them less than 1 cm. long, the longest 

 ones 10 to 16 cm. long; flowers broadly funnelform, 4 to 6 cm. broad; throat 2 to 3 cm. broad at top; 

 inner perianth-segments deep orange, 1 to 1.5 cm. long, the outer ones apiculate, the inner ones 

 obtuse or truncate; filaments very short, 5 to 8 mm. long, yellow; style, including the slender stigma- 

 lobes, 2 cm. long; areoles of the ovary and flower small, filled with black and white w T ool and nascent 

 spines; fruit globular, 6 to 7 cm. in diameter, greenish yellow, covered with clusters of deciduous 

 spines, juicy, said to be edible; seeds dull in color, 1.5 mm. long. 



