WEBEROCEREUS. 



215 



Plate xxxix, figure i, shows a flowering branch of a plant obtained by Wm. R. Maxon 

 in Costa Rica in 1906, which flowered in the New York Botanical Garden in May 1913. 



1. Weberocereus biolleyi (Weber) Britton and Rose, Contr. U. S. Nat. Herb. 12: 431. 1909. 



Rhipsalis biolleyi Weber, Bull. Mus. Hist. Nat. Paris 8: 467. 1902. 

 Cereus biolleyi Weber in Schumann, Gesamtb. Kakteen Nachtr. 60. 



I93- 



Branches long, slender, and flexuous, climbing over or hanging from branches of trees, 4 to 

 6 mm. in diameter, terete or slightly angled, in juvenile plants often flattened or 3-winged, usually 

 spineless but occasionally bearing i to 3 yellow spines from an areole; areoles small, remote; flowers 



3 to 5 cm. long; all perianth-segments oblong, obtuse, the inner pinkish; ovary tuberculate, hairy. 



Type locality: Vicinity of Port Iyim6n, Costa Rica. 



Distribution: Costa Rica. 



The branches are often only 4 mm. in diameter and spineless. When cuttings are made 

 from these branches queer juvenile forms develop. In one case a flat, thin, 2-edged branch 

 10 mm. broad was produced with closely set areoles filled with white, bristle-like hairs; 

 from the same cuttings a similar branch was developed, but 3-angled, like a juvenile 

 Hylocereus. 



Plate xxxix, figure 2, is from a plant collected at Zent, Costa Rica, by H. Pittier, which 

 flowered in the New York Botanical Garden, July 18, 1913. 



3. Weberocereus panamensis sp. nov. 



Stems i to 2 cm. broad, strongly 3-angled or some joints flat; margins acute, indented; areoles 

 small, each hidden beneath a small thick scale, sometimes bearing i to 3 short weak spines; flower 



4 to 7 cm. long; outer perianth-segments and inner scales yellowish green, erect; inner perianth- 

 segments white, oblong; tube proper smooth and white within; throat i cm. long; stamens included; 

 filaments white, a part attached to the lower face of the throat and a part to the upper margin ; 

 style white, included; stigma-lobes white (in wild state said to be purple); ovary tuberculate, green, 

 with spreading scales, each subtending 4 to 8 long white hairs; fruit red, 2 to 3 cm. in diameter, 

 tubercled, at least when young. 



FIG. 295. Weberocereus panamensis. 



Collected in forest thickets along the Rio Fato, Province of Colon, Panama, July 1911, 

 by H. Pittier (No. 3903) and flowered first in Washington in 1913. 



Plate xxxvin, figure 3, is from the type specimen, which flowered in the New York 

 Botanical Garden, September 20, 1915. Figure 295 shows a fruiting branch collected by 

 Mrs. D. D. Gaillard at Lake Gatun, Panama, in 1913. 



