\ 



REVISION OF THE GENUS CEREUS MILL. 



79 



XV. LEPTOCEKEUS A. Berg. 



Flowers short, turbinate-campanulate, fleshy; ovary and tube with 

 short scales with wool and clusters of bristles upon the pulvilli; peri- 

 anth leaves rather short, little expanded; stamens numerous from the 

 middle of the thickened tube; style as long as the perianth, with 5-6 



short styles. 



ropical Cerei witt 

 is form this subg 

 onsidered the tyj 



(Leptocere 



5 



T> 



Cereus assurgens Griseb. may 



C. (Leptocereus) Gonzalezii Web. L c. Nachtr. 58. 



Web 



Cuba. 



Costa Rica 

 Costa Rica. 



A Cereus W( 



Hartmann has lately been 



Wein 



old a 



kunde 



(See Monatsschrift fiir Kakteen 

 905: 8). 



XVI. ECHINOCEREUS Engelm. in Wisliz. Tour North. 



Mexico. 91. (1848). 



Flowers diurnal, short, rarely tubular; ovary and tube with woolly 

 and prickly pulvilli; sepaloid and petaloid perianth leaves numerous 

 and showy, mostly patent; stamens numerous, inserted along the tube. 

 Style longer, ending in short green stigmata. Fruit round, reddish or 

 green, aculeate; seeds small, obovate or subglobose, compressed, punc- 

 tate. 



A very natural subgenus and easily recognized. 



Subsection I. Graciles Engelm. 



Cereus (Echinocereus) t uberosus Poselg, 1. c. 249. 



Texas etc. 



Subsection II. Subinermes K. Sch. 



Cereus (Echinocereus') Knippelianus (Liebn. ) A. Berg. 1. c. 



Mexico. 

 C. (Echinocereus) pulchellus Pfeiff. 1. c. 252. -Mexico. 



C. (EcMnocereus) subinermis Hemsl. 1. c. 250. — Mexico. 



251 



