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172 



THE CACTACEAK. 



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 Unear 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. Cact. ed. 2. 660. 1885) was given by 

 Riimpler as a synonym of P. fossulatus. Pilo- 

 cereus J ovcolatus Labouret (Rev. Hort. 1862:428. 

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



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Fig. 244. — Oreocereus celsianus. 



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Fig. 245. — Oreocereus celsianus. 



celsianus. Pilocereus williamsii I^emaire (Rev. Hort 



1862: 428. 



name 



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fossulatus 



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



Monatsschr 



Pilocereus celsianus lanuginosior. 



Figure 244 is from a photograph tak 

 above Arequipa, Peru, in 1914; figure .^^ .. .,^,,, ^ ..^^^ 

 photograph of a joint; figure 246 shows the flower and ^^^-m^- 

 figure 247 the immature fruit of the plant photographed 



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