BERGEROCACTUS. 



IO7 



Underground stems slender, spineless, branching near the surface of the ground; branches some- 

 what clavate, becoming bronzed, 6-ribbed; spines all black at base, brown at tip; radial spines about 

 6, acicular, central spine solitary, porrect, slender; flowers probably purplish, 5 to 6 cm. long, with 

 a rather broad throat; fruit fleshy, spiny; seeds not known. 



Type locality: Near Aranas, Santiago, Chile. 



Distribution: High mountains of Chile, near vSantiago. 



This species has been described under four specific names, and has been referred to 

 four genera. We refer it to Erdisia on account of floral similarity to E. squarrosa. 



Illustrations: Gartenflora 21: pi. 721, f. 3, as Opuntia clavata; Gartenflora 31: pi. 1085, 

 as Cereus hypogaeus. 



Figure 157 is a copy of the first illustration above cited. 



PUBLISHED SPECIES, PERHAPS OF THIS GENUS. 



Cereus apiciflorus Vaupel, Bot. Jahrb. Engler 50: Beibl. in: 15. 1913. 



Prostrate or ascending, the stems 2 to 2.5 cm. thick, about 10, spreading; central spine solitary, 

 2 to 3 times as long as the radials; flowers numerous, forming a crest at the top of the plant, 4 cm. 

 long; ovary terete, 1 cm. long, covered with numerous small lanceolate scales bearing brown felt 

 and reddish-brown bristles in their axils. 



Type locality: Valley of Puccha River, Department of Ancachs, Peru. 



The author compares the flowers of this plant with those of Cereus aureus Meyen. 



14. BERGEROCACTUS Britton and Rose, Contr. U. S. Nat. Herb. 12: 435. 1909. 



Low, much branched cactus, with stout, cylindric, spreading or ascending branches; ribs many, 

 low; areoles approximate; spines many, yellow, acicular; flower small, pale yellow, with short tube 

 and widely expanded limb; scales on ovary and flower-tube small, bearing felt and spines in their 

 axils; perianth-segments small, obtuse; fruit globose, densely spiny; seeds obovate. 



Fig. 158. — Bergerocactus emory 



