1 62 



THE CACTACEAE:. 



Exploring E 

 Herbarium 



J 



Lima 



Wilkes 



Agate's painting of it is preserved in the Library of the Gray 



Plate XXV, figure 3, shows a flowering plant collected at the type locality by Dr. Rose 



in I 



same 



5. Borzicactus decumbens (Vaupcl). 



Cereus decumbens Vatipel, Bot. Jahrb. Englcr 50: Beibl. 111:18. 1913- 



Plant ccspitose, procumbent or ascending, forming small clumps; branches slender, 3 to 4 cm. 

 in diameter; ribs numerous, 20, low, almost hidden under the spines, the mtervals acute; areoles 

 close together, about 5 mm. apart; radial spines very numerous, about 30, acicular, short 5 to 8 

 mm long, yellowish; central spines usually 5, much longer and stouter than the radials, often 2 to 

 ■; cm long, subulate ; flower '8 cm. long, with a slender cylindric tube gradually expanded mto the 

 throat the limb about =; cm. broad; perianth-segments described as white, oblong to oblanceolate. 



Type locality: Rocky sandy bottoms, Mollendo, Peru. 

 Distribution: On hills, southwestern Peru, and northwestern Chile. 

 The type of this species was first collected by Weberbauer in 1 902 

 Mollendo, and here Dr. Rose collected living and herbarium specimens ir 



Old flowers 



specimens 



New York Botanical Garden . 



Three collections made by Dr. Rose in southern Peru are refern 

 One is from near Arequipa, altitude about 7,000 feet, the second is from 

 about 2.000 feet, and the third is from hills above Mollendo 



mentioned 



This is an unusually wide range for a species in this region. The 



themselves 



consider- 



■ir^i . 









■ ', -i \'- 





- - A 



4 ,-" ■-'■:- ^ 



' i 



■■■* ^ . 



t -J" 



able variation, suggesting that 



more 



Until fresh flowers have been ob- 



seems 



only the one species. 



Fig. 232. — Borzicactus decumbens. 



Fir,. 233. — Flower of Borz.i 

 tus decumbens. Xo.y- 



■^■L 



\. 



Figure 232 is from a photograph taken by Dr. Rose near Arequipa, Peru, showing this 



J 



Sohrens near Tacna, Chile. 



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. . j_.. 



