TRICHDCICRI'H'S. 



141 



Figure 203a shows a flower and figure 2036 a fruit, collected by Dr. Shafer near Salta, 

 Argentina, in 19 16; figure 204 is from a photograph taken by Dr. Shafer at >Salta, Argentina, 

 in 191 7. 



14. Trichocereus fascicularis (Meyen). 



Cereus fascicularis Meyen, Ally. Gartenz. 1:211. 



1833. 

 Cactus fascicularis Meyen, Reise i: 447. 1834. 

 Echinocactus fascicularis Steudel, Norn. ed. 2. 



1 : 536. 1 S40. 

 Cereus weberbaueri Schumann in Vaupel, Bot. 



Jahrb. Engler 50: Beibl. in: 22. 1913. 



Growing in large clusters made up of many 

 slender, erect or ascending branches, 2 to 4 meters 

 high; ribs about 16, low, rounded, separated by 

 narrow intervals; areoles filled with tawny felt, 

 closely set, large; spines numerous, at first yellow- 

 ish to brown; radial spines acicular, often only 

 1 cm. long or less; central spines much stouter 

 and often 4 cm. long; flowers 1 from an areole, 8 

 to 1 1 cm. long, slender, somewhat curved near the 

 base ; ovary and flower-tube bearing small ovate scales, their axils filled with long white and brown 

 hairs; outer perianth-segments narrow, acute, passing into broader ones, simply mucronate, pinkish; 

 inner perianth-segments thinner and a little broader than the outer ones, obtuse, 1.5 em. long, 

 greenish to brownish (not white) ; filaments numerous, slender, scattered over the narrow throat, 

 somewhat exserted; style bulbose at base, slender, 7 cm. long, exserted; stigma-lobes short, green- 

 ish ; lower part of tube or tube proper 1 . 5 em. long, somewhat scabrous within ; fruit globular, 3 to 

 4 cm. in diameter, yellowish to reddish, splitting open on one side and exposing the pulp; seeds 

 black, shining, 2 mm. long, a little longer than broad, minutely punctate. 



Type locality: Southern Peru. 



Distribution: Mountains of southern Peru and northern Chile, at about 2,300 meters 

 altitude. At Arequipa it is especially common, being found both above and below the 

 city, where it was collected by Dr. Rose in 1914 (No. 18781). 



This species, although recently described as new under the name of Cereus weberbaueri, 



is the one described by Meyen in 1833 as 

 Cereus fascicularis. Meyen's description is 

 very unsatisfactory, but he does describe the 



-Trichocereus fascicularis. 



Fig. 206. — Flower of Trichocereus fascicularis. 

 Fig. 207. — Fruit of same. X0.7. 



Fig. 208. — Flower of Trichocereus huascha. 

 Fig. 209. — Fruit of same. X0.7. 



X0.7. 



habit, number of ribs, and size of flowers, all of which answer fairly well to our plant. A 

 translation of his brief description is as follows: Erect, 16-angled, 4 feet high, somewhat 

 jointed (3 to 4 joints); spines 8 or 9, in a radiating circle; flowers 9 or 10, white, 3.5 

 inches long, at the ends of the branches. 



