172 



the; cactaceae;. 



A bushy cactus, about i meter high, the slender branches either prostrate or ascending below, 

 erect above, about 8 cm. thick; ribs about 10, obtuse, i cm. high, more or less broken up into 

 tubercles; areoles bearing long hairs and several stout yellow spines sometimes over 5 cm. long; 

 flowers borne near the tops of the stems, slender, 7 to 9 cm. long; limb 2 to 3 cm. broad; scales of the 

 perianth-tube narrowly lanceolate, long-acuminate, 5 to 6 mm. long, much shorter than the hairs ; 

 inner perianth-segments linear to linear-oblong, acutish, the outer obtuse; fruit about 3 cm. in 

 diameter, essentially smooth when mature, the basal 

 pore about 5 mm. in diameter. 



Type locality: Mountains of Bolivia. 



Distribution: Bolivia, southern Peru, and 

 northern Chile. 



Pilocereus celsianus fossulatus Labouret (For- 

 ster, Handb. Caet. ed. 2. 660. 1885) was given by 

 Riimpler as a synonym of P. fossulatus. Pilo- 

 cereus foveolatus Labouret (Rev. Hort. 1862: 428. 

 1862) was given by Lemaire as a synonym of P. 



Fig. 244. — Oreocereus celsianus. 



celsianus. Pilocereus williamsii Lemaire (Rev. Hort. 

 1862: 428. 1862), only a name, is usually referred here. 



Illustrations: De Laet, Cat. Gen. f. 50, No. 7; Knip- 

 pel, Kakteen pi. 28; Wiener, 111. Gart. Zeit. 29: f. 22, No. 

 7, all as Pilocereus celsianus; Cact. Journ. 2: 5; Gard. 

 Chron. 1873: f. 197, both as Pilocereus fossulatus ; Diet. 

 Gard. Nicholson 3: f. 151 ; Forster, Handb. Cact. ed. 2. f. 

 86, both as Pilocereus bruennowii; Monatsschr. Kakteenk. 

 14: 169, as Pilocereus celsianus bruennowii; Rep. Mo. Bot. 

 Gard. 16: pi. 2, as Cereus celsianus; Gartenflora 56: f. 49, 

 as Pilocereus straussii; Monatsschr. Kakteenk. 24: 131, as 

 Pilocereus celsianus lanuginosior. 



Figure 244 is from a photograph taken by Dr. Rose 

 above Arequipa, Peru, in 1914; figure 245 is from a 

 photograph of a joint; figure 246 shows the flower, and 

 figure 247 the immature fruit of the plant photographed. 



Fig. 246. — Flower of Or 



X0.7. 

 Fig. 247. — Fruit of same. 



