PSEUDORHIPSALIS. 213 
Illustration: Schumann, Gesamtb. Kakteen 633. f. 98, H, as Rhipsalis monacantha. 
Figure 213 is from a photograph of a herbarium specimen collected at Calilegua, 
Jujuy, Argentina, nA A. Shafer in 1917 (No. 56). 
CZ 5. PSEUDORHIPSALIS gen. nov. 
Epiphytic, much branched, and elongated cacti, at first erect, but soon prostrate or hanging; 
branches flattened, rather thin, serrate or crenate; flowers numerous, borne solitary at the lateral 
areoles, narrowly campanulate; segments united into a short but definite tube; ovary and fruit 
globular, bearing several scales; seeds black. 
Two species are here included, of which Cactus alatus Swartz is made the generic type. 
These plants in their habit and branches resemble certain species of Rhipsalis, especially 
R. ramulosa and its relatives, but differ from all the species of Rhipsalis in having united 
perianth-segments and more scaly ovary and fruit. 
Ovary and outer perianth-segments reddish. ..... 0.0... ce cece cece ee cecccccecceceeee. 1. P. himantoclada 
Ovary and outer perianth-segments greenish or yellowish green.................0....08 2. P. alata 
1. Pseudorhipsalis himantoclada (Roland-Gosselin). 
Rhipsalis himantoclada Roland-Gosselin, Bull. Soc. Bot. France 55: 694. 1908. 
Wittia costaricensis Britton and Rose, Contr. U. S. Nat. Herb. 16: 261. 1913. 
Fic. 214.—Pseudorhipsalis himantoclada. 
Stems 4 to 5 dm. long, erect or curved, flat, 1 to 3 cm. broad, with horizontal branches narrowed 
at base, pointed, the margin low-serrate; areoles 12 to 15 mm. apart; ovary, tube, and sepals purplish ; 
Ovary 3 mm. long, bearing a few very short scales; tube of flower about 8 mm. long; inner perianth- 
segments white, obtuse, spreading; stamens erect; style white; stigma-lobes 4. 
Type locality: Pozo Azul, Costa Rica. 
Distribution: Costa Rica. 
We are told by Mr. Otén Jiménez that Mr. Wercklé, who first collected the plant, 
would refer Wittia costaricensis here. He states also that it is very luxuriant and when 
growing wild becomes so large that one man can not carry a single plant. 
Illustration: Contr. U. S. Nat. Herb. 16: pl. 82, as Wittia costaricensis. 
Plate xxun, figure 6, shows a flowering branch collected by Wercklé in 1907 which 
flowered in the New York Botanical Garden, December 20, 1911. Figure 214 is from a 
photograph of a terminal branch; figure 215 shows a flowering branch; figure 216 shows a 
flower cut longitudinally. 
“a, Pseudorhipsalis alata (Swartz). 
> Cactus alatus Swartz, Prodr_ 77. 1788. a8 
Cereus alatus De Candolle, Prodr. 3: 470. 1828. 
Epiphyllum alatum Haworth, Phil. Mag. 6: 109. 1829. Not Haworth, 1819. 
Rhipsalis swartziana Pfeiffer, Enum. Cact. 131. 1837. ; 
Hariota swartziana Lemaire, Cact. Gen. Nov. Sp. 75: I 39. 
Rhipsalis alata Schumann in ng retiag : 288. 1890. 
Hariota alata Kuntze, Rev. Gen. Pl. 1: 262. 1891. 
Rhipsalis harrisii Giirke, Monatsschr. Kakteenk, 18: 180. 1809. 
