HYLOCEREUS. 



185 



bottom of each undulation; spines 5 to 8, acicular, 5 to 12 mm. long; flowers 25 to 30 cm. long and 

 fully as broad; outer perianth-segments narrow, long-acuminate, greenish, spreading or rcflcxed- 

 inner perianth-segments oblong, acuminate, white; style stout; stigma-lobes linear entire green' 

 ovary covered with imbricated, ovate, acute, purplish-margined scales 



Mexico or Colombia 



Distribution: Mexico 



from 



h bloomed in 19 12 (No. 6170). 



Mr. Weingart is strondy of the opinion that Cereus na 



The species is known to us from cultivated plants only. 



this species and, if so, this name 

 from an old olant. while the r 



K 



He states that C. napolconis was described 



thinks, would account for the differences in the descriptions. We beUeve, however, that the 

 two species are distinct and that C. napoleonis is much nearer //. triangularis. 



Illustration: Monatsschr. Kakteenk. 23: 29, as Cereus ocamponis. 



Plate XXVII f shows a flowering joint of a plant in the collection of the New York 

 Botanical Garden. 



A species related to H, ocamponis but probably distinct was collected by T. S. Brande- 

 gee on rocks of Cerro Colorado, Sinaloa, Mexico, November 1904. Mr. Brandegee states 

 that it is also epiphytic on trees. Rose, Standley, and Russell collected the same species 

 at Villa Union, near Mazatlan, in 19 10, but, although we have had it in our collections 

 ever since, it has not yet flowered. 



4. Hylocereus bronxensis sp. nov. 



^ - 



Joints strongly 3-angled, dull grayish green, 3 to 4 cm. broad; ribs strongly undulate, the margins 

 horny and brown ; areoles 2 to 3 cm. apart; spines about 10, acicular, brown in age, about 6 mm. long; 

 flowers 25 cm. long; outer perianth-segments broad, ovate, obtuse or rounded; inner perianth- 

 segments oblong, rounded at apex, more or less apiculate, but not long-acuminate; scales on the 

 ovary broad; stigma-lobes (perhaps) bifid. 



Described from specimens which flowered in the New York Botanical Garden (No. 

 9722) June 28, 1912. The plant was obtained from G. E. Barre in 1902, but its origin is 

 otherwise unknown. It is related to Hylocereus ocamponis but its flowers are quite different 

 from those of that soecies. 



Hylocereus polyrhizus (Weber). 



Cereus polyrhizus Weber in Schumann, Gesamtb. Kakteen 151. 1897. 



afterwards green 



straight 



age Decommg more lurgia; margin uK:<xiiy :>ti«.igiiL, y^u^^^^y nv^v ^.^...j , ^^...^^^ w,^, .«.w.^. ^wv,„., 

 brownish 2 to 4 mm. long, sometimes accompanied by two white hairs or bristles which finally drop 

 off- young flower-buds globular, purple; flowers 2,5 to 3 dm. long or longer, strongly fragrant; outer 

 perianth-segments Unear-lanceolate, more or less reddish, especially at the tips; inner perianth-seg- 



tigma-lobes rather short, yeUowish, entire; ovary 



ovate scales, with red or deep purple margins; frmt scarlet, oblong, lo cm. long. 



Type locality: Colombia. 

 Distribution: Colombia and Panama 



po 



Weingart (Monatsschr 



Kakteenk. 22: io6) associates the plant with the group in 

 to the New York Botanical Garden in 1901 by M. Simon 

 collection many cacti described by Weber, are, apparently, 

 from Panama and Colombia ; perhaps also from Ecuador 



t 



1. 



