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 1 9 1 5 (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 1 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 191 7. 

 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. 



Fig. 41. — Flower 

 of C. zehntneri. 

 X0.6. 



