194 



THE CACTACEAE. 



IIyi.ockrEus sp. 



Surinam 



J. A, Samuels collected a species of this genus in the forest plantation, La 



found in Dutch Guiana. Dr. Samuels's plants are 

 spines on some specimens are represented by lo to 

 branches which are more mature are less than 2 cm 



long. 



cm. apart; the margin of the rib is almost straight; spines 3 to 5, brown, 2 to 3 mm. 



are without flowers or fruit. While reading the last proof, specimens 



specimens 



m Ceroid Stahel. of Paramaribo. Surinam 



from that country is Hy 



Here pro 



from Surinam which Linnaeus called Cactus trianmlaris (Amoen 



1785). 



/ 





iL 



Fig. 270. — Hylocereus 



Fig. 271. — Joint of H. 

 calcaratus. X0.5 



Hylocereus sp. 



A species, apparently of this genus. 



It is a long, clambering 

 sometimes killing them. 



margms ot the ribs rather thick, hardly undulate : the areoles ^ to 6 cm 



cm 



Carrizal, Vera Cruz, May 25, 1901 (No 



It was collected by E- A. Gold- 

 Its flowers and fruit are unknown. 



Hylocereus sp. 



Branches slender, 3-angled, or sometimes nearly terete, 2 to 3 cm. broad, dull green, sometimes 

 perhaps glaucous; margin not horny ; areoles often distant, sometimes 5 cm. apart, bofne on prominent 

 and more or less reflexed knobs : somes brown. 2 to ^ ^tnnt r>on,V ^ ^ ' ^ 



and more or less reflexed knobs; spines brown, 2 to 4, stout, conic. 



Cabello 



870). 



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