TRICHOCEREUS. 



133 



Cereus lamprochlorus salinicolus Spegazzini (Anal. Mus. Nac. Buenos Aires II. 4: 286. 

 1902) from southern Argentina, may belong here, but it is much south of the range of this 

 species; Cereus cliilocnsis lamprochlorus Monville (Labouret, Monogr. Cact. 326. 1853) is 

 given as a synonym. Echinocactus wangertii (Labouret, Monogr. Cact. 326. 1853) has 

 been referred here as a synonym. 



The type specimens were without flowers and fruit. Afterward, Schumann referred 

 to this species a plant collected by Otto Kuntze in Jujuy, Argentina, in October 1892. 

 A specimen of this collection is now in the herbarium of the New York Botanical Garden, 

 and has been used in drawing up the above description, together with plants and speci- 

 mens obtained by Dr. Shafer at Andalgala, Argentina, in 1917 (No. 13). A cespitose 

 plant with long procumbent stems is sometimes associated with this species, but whether 

 conspecific with it or distinct we have been unable to ascertain. 



Illustration: Monatsschr. Kakteenk. 26: 60, as Cereus lamprochlorus. 



Figure 192 is from a photograph of plants in flower, taken by Dr. Shafer in 1917. 



Fni. 192 Trichocereus lumprochlorus. 



5. Trichocereus pasacana (Weber). 



Pi/ocereiis pasucaiiii Riimpler in Forster, Handb. Cact. ed. 2. 678. 1885. 

 Cereus pasacana Weber, Monatsschr. Kakteenk. 3: 165. 1893. 



Plant often 6 to 10 meters high, sometimes less than i meter, usually either simple or with few 

 branches and resembling a small Carnegiea gigantea, sometimes with a number of branches from 

 the base, more or less club-shaped, 3 dm. in diameter near the top, when old spineless at base; ribs 

 20 to 38, low, 2 cm. high; areoles large, approximate, sometimes touching one another; spines 

 numerous, rather variable on young plants; spines yellow, stiff, subulate, the longer ones 4 to 14 

 cm. long; on old plants, especially flowering ones, elongated, flexible, sometimes bristle-like, 10 to 

 12 cm. long, yellow or even white; flowers 10 cm. long, the ovary and tube covered with long brown 

 hairs; fruit globular, about 3 cm. in diameter; seeds small, dull black. 



Type locality: High valleys of cordilleras of Catamarca and Salta, Argentina. 



Distribution: Argentina and Bolivia. 



This species is very characteristic of the high plains of northern Argentina and Bolivia, 

 sometimes growing in valleys, but usually along cliffs and on rocky hillsides, and often forms 

 the most conspicuous plant in the landscape. The woody trunks are used for making goat 

 corrals and rude huts. The fruit, which is said to be edible, is called pasacana. 



Illustrations: Nov. Act. Soc. Sci. Upsal. IV. i: pi. 4; pi. 5, f. i, as Cereus pasacana. 



