74 



MISSOURI BOTANICAL GARDEN. 



XIII. ERIOCEREUS A. Berg. 



Ovary roundish with deltoid acute scales; tube with similar but larger 

 and more remote scales, in their axils with more or less copious white 

 wool, on the ovary sometimes with a few spines; sepaloid perianth 

 leaves acute, greenish brown; petaloid ones white; stamens numerous, 

 in two groups. Fruit roundish, with the dried remains of the flower 

 more or less persistent, red, with the pulvilli more or less raised, scales 

 often a little increased, with wool and often spines in their axils; pulp 

 white, seeds numerous, black, opaque, compressed, strongly papillous 

 along the crest. —Plate 7,/. 5-6; plate 9,f. 1 ; plate 10. 



S 



This subgenus comprises 



most of the Tortuosi of K. 



It approaches E 



which, how- 



ever, it is distinguished by the larger scales of the ovary 

 and by the white wool of the pulvilli and tube. The tube is 

 never armed with bristles except in Cereus Martinii Lab. 

 Stems of the species mostly procumbent. Fowers showy, 

 white, nocturnal, very uniform. Cerew tortuosus Forb. 

 may be considered the type of this subgenus. 



i 



Cereus (Eriocereus) Bonplandii Parin. 1. c. 135. — Paraguay. 



? 



Argentina. 



C. (Eriocereus) Jusberti Kebut. 1. c. 137, 



C. (Eriocereus) Martinii Lab. 1. c. 141. 



C. (Eriocereus) pomanensis Web. 1. c. 13G. — Argentina. 



C. (Eriocereus) repandus Haw. 1. c. 94. — Antilles ? 



C. (Eriocereus) tephr acanthus Lab. 1. c. 80. — Bolivia. 



C. (Eriocereus) tortuosus Forb. 1. c. 139. — Argentina. 



Cereus Jusberti Kebut is, according to repeated assur- 



ances of 

 and a Ce 



Echinop 



All these plants are quite hardly at La MortoJa and flower 

 annually. Cereus tortuosus Forb. produces its beautiful 

 flowers in great quantity every summer and ripens many 

 fruits, from which this species has been widely distributed. 

 Cereus pomanensis Web. comes very near to it, but has an 

 unarmed fruit. The fo 

 very characteristic. 



m of the seeds of E 



cereus is 



