126 



THE CACTACEAE. 



undulate; arcoles 2 to 3 cm. apart, small, brown-felted; spines 2 to 6, acicular, brown, swollen at 

 base, unequal, the longest 2 cm. long; flowers and fruit unknown. 



Collected near Barrinha, Bahia, Brazil, by Rose and Russell, June 8, 1915 (No. 19808). 



plant. In the shape and color of the branches 



. A 



remarkable 



it suggests some species of Hylocercus such as H. ocamponis, but it is a true terrestrial and 

 never develops aerial roots. It is inconspicuous, growing in the bushy flats, and easily 

 overlooked. Numerous cuttings were sent to the New York Botanical Garden by Dr. 

 Rose, but only one of these lived, and this has not yet made any new growth. It may not 

 be of this genus, for it does not resemble closely any of the described species. 



Fieure 187 is from a ohotoeraoh taken bv Paul G. Russell in iqi s at the type locaHty. 



Fig. 186. — Acantliocereus brasiliensis. 



V 



Fig. 187. — Acaiithocereus (?) albicaulis. 



DESCRIBED SPECIES. PERHAPS OF THIS GENUS. 



CerEus TENELI.US Salm-Dyck in Pfeiffer, Knum. Cact. 109. 1837. 



or.o.f"^''-''''''*' ''JF"'^^^' f to 12 mm. in diameter; ribs 4 or 5, thin, compressed, areoles 8 to 

 apart, spmes setiform, brown, short, 6 to 8 mm. long; flowers and fruit unknown. 



10 mm. 



Type locality: Brazil. 



wn to us from the incomplete d( 

 synonym C. candelahrius (Knum 



1837) 



