214 



THE CACTACEAE. 



Pendent from trees and rocks, up to 5 meters long, branched; joints broadl}- linear to lanceolate 

 or linear-oblong, 2 to 4 dm. long, 3 to 6 cm. broad, obtuse, the margin crenate-imdulate ; flowers 

 yello^vish white, 15 mm. long; flower-tube 4 mm. long; perianth-segments 10, lanceolate, acute; 

 stamens numerous, about half as long as perianth ; style slender ; stigma-lobes 5 ; ovary somewhat 

 tubercled, bearing several broad scales; fruit ovoid, i cm. long, j^ellowish green; seeds obovate, 

 black, bearing depressed tubercles; hilum oblique. 



Type locality: Jamaica. 



Distribution: ^Mountains of Jamaica. 



This plant has usually passed as a Rliipsalis, but its definite flower-tube and somewhat 

 tubercled and scaly ovan^ exclude it from that genus. This species has long been known in 

 Jamaica; it was mentioned b}- Sloane as a spineless Opuntia and it is also referred to by- 

 Patrick Browne. 



Figs. 215 and 216. — Top of flowering branch and 

 longitudinal section of flower of Pseudorhipsalis 

 himantoclada. X 2 • 



Figs. 217 and 2 1 8. — Section of flower and flowering 

 branch of Pseudorhipsalis alata. X0.66. 



Cactus dentatus Ruiz (Martius, Fl. Bras. 4-: 288. 1S90) was given as a s\Tionym of 

 Rliipsalis alata by Schumann, but better referred to R. ramnlosa (see page 241). 



Cereiis alatus crassioi- Salm-Dyck (Hort. Dj-ck. 66. 1834) is only a name, which may 

 or may not refer to the Jamaican plant. 



Illustration: Torreya 9: 157. f. 2, as Rliipsalis alata. 



Plate XXII, figure 5, shows a plant collected bv Dr. Britton in Jamaica in 1907, 

 which flowered in the New York Botanical Garden, November 8, 1912. Figure 218 shows 

 a flowering branch (natural size) ; figure 217 shows half of a flower with tube, perianth- 

 segments, and stamens. 



