CEPHALOCEREUS. 



35 



Type locality: Certao, Pernambuco, Brazil. 



Distribution: Semi-arid parts of Pernambuco and Bahia, Brazil. 



This species is very common in the dry parts of Bahia and Pernambuco, where it is 

 known as chique-chique. The town Chique Chique on the Sao Francisco River takes its 

 name from this plant. Several collections of this plant were made by Dr. Rose in Bahia 

 in 1915 (Nos. 19945, 19846, and 19289). 



FIG. 40. Cephalocereus gounellei. 



The perianth is relatively longer and narrower than that of other species of this genus. 



Illustrations: Monatsschr. Kakteenk. 18: 21, as Cereus setosus; Veg- 

 etationsbilder 6: pi. 15, as Pilocereus setosus. 



Plate iv, figure 2, shows the top of a plant collected by Dr. Rose near 

 Joazeiro, Bahia, in 1915. Figure 40 is a nearby view of a good-sized plant 

 taken by P. H. Dorsett in northern Bahia, Brazil, in 1914. 



12. Cephalocereus zehntneri sp. nov. 



Low, much branched, and spreading; branches 3 to 4 cm. in diameter, about 

 9-ribbed, more or less tubercled; areoles i to 2 cm. apart, long-hairy when young; 

 spines often 30 or more, only slightly spreading, all acicular and bright yellow, the 

 centrals similar to the radials or a little longer, the longer ones 3 to 4 cm. long; 

 flowering areoles producing with the flowers long tufts of white wool ; flowers slender, 

 tubular, 6 to 7 cm. long, white to light cream-colored; inner perianth-segments 

 oblong, obtuse; style slender, glabrous, cone-shaped at base; ovary naked. 



Collected by Leo Zehntner, from the Serra de Tiririca, Bahia, Brazil, November 1917. 

 It is called chique-chique das pedras and is similar in habit to the one from Joazeiro described 

 above. Dr. Zehntner says, however, that it prefers a rocky habitat while the common 

 chique-chique is found on sandy ground and this statement is in accordance with Dr. 



?ic 



O f C. zehntnerL 



Xo.6. 



