HYLOCEREUS. 



193 



Salm-Dyck (Cact. Hort 



Mexican 



distinct species. 



minute. Salm 



220. 1850) described C. triangularis iihdcanus, 

 It is described with 4 to 6 radial spines and i 



Salm 



Hort 



synonym 



was given as a 



Miller, who 



compressus 



~f ^^^...^^ c lixuonctLii^ii (^wpeia J30L. I : pi. : 



to Cactus triangularis, and which we believe represents 



J 



Linnaeus referred 



Martyn 



pentagonus (?), which seems 



Miller's Gardeners' Dictionary refers Miller's Cams compressus 



compressus to Mexico 



20. 36. 191 2) belongs here. 



Cephalocereus compressus (Monatsschr 



The Index Kewcnsis refers Cercus 



Hist 



Illustrations: Plukenet, Opera Bot. i: pi. 29, [. 3, as Cereus erectus cristatus; Bradley, 



m 1907 



Mandeville, Jamaica 



Fig. 269. — Joint of Hylocereus triangularis. X0.5. 



16. Hylocereus antiguensis sp. no v. 



Stems high-clambering, forming great masses in the crotches of high trees or covering the 

 tops of low trees; joints 2 to 4 cm. thick, 3-angled, rarely 4-angIed; margins of ribs not horny, hardly 

 undulate; areoles 2.5 to 3.5 cm. apart; principal spines 2 to 4, about 6 mm. long or less, accessory 



1 _ .X • ., segments linear; inner perianth-segments 



w, at least drying so, broader than the outer segments 



This species is nearest H. trigonus, but the margins 

 ription is based on specimens collected by Dr. Ro; 



The 



1909. 



we have both living and herbarium specimens. It flowered in the New York Botanical 

 Garden in 191 6. 



Figure 270 is from a photograph taken by Paul G. Russell on Antigua in 19 13. 



17. Hylocereus calcaratus (Weber) Britton and Rose, Contr. U. S. Nat. Herb. 12: 428. 



Cereus calcaratus Weber, Bull. Mus. Hist. Nat. Paris 8: 458. 1902. 



A climbing vine, the joints 4 to 6 cm. wide, strongly 3-winged, green, the margin divided into 

 numerous prominent lobes; areoles small, from the upper angles of the marginal lobes, spineless but 

 bearing 2 to 4 small, white bristles. 



Type locality: Port Limon. Costa Rica. 



Distrih 



Costa Rica. 



Neither flowers nor fruit were known to Dr. Weber 

 had it for a number of years and it has not yet flowe 



)f Hylocereus, having very peculiar stems '< 



It is very unHkc the 



of this genus. 



W. R. Maxon 



J 





V. 





_ I b 



