RHIPSALIS. 229 



Plate XXI, figure 4, shows a branch from the plant collected by Dr. Rose on Tijuca in 

 1915 (No. 21 174); figure 2 shows another plant collected by him in Rio de Janeiro, Brazil 

 (No. 20309). 



15. Rhipsalis shaferi sp. nov. 



Stems at first stiff, erect or ascending, afterwards spreading or procumbent, 4 to 5 mm. thick, 

 terete, green or more or less purplish at tips; juvenile and lower branches often bearing several bristles 

 at areoles ; upper branches without bristles or with a single appressed one ; scales subtending the areoles 

 small but broad; flowers numerous, scattered all along side of branch, solitary (rarely in pairs) at 

 areoles, small, rotate, greenish white, 8 to 10 mm. broad; petals 5 or 6, short-oblong, obtuse; fila- 

 ments greenish, erect; stigma-lobes 4, white; ovary not sunken in branch; fruit small, globose, 

 2 to 3 mm. in diameter, white or sometimes tinged with pink. 



Collected by John A. Shafer on trees at Asuncion, Paraguay, March 18, 191 7 (No. 139), 

 on trees at Trinidad, Paraguay, March 17, 1917 (No. 134, type), again in Paraguay (Nos. 

 145 and 147), and on trees at Posados, Misiones, Argentina (No. 131). 



Plate XXIV, figure 7, shows a branch in flower; plate xxi, figure 3, shows a branch in 

 fruit of the type which flowered in the New York Botanical Garden in 1921. Figure 223 

 is from a photograph of Shafer's No. 131, which flowered and fruited in Washington in 192 1. 



16. RhipsaUs fasciculata (Willdenow) Haworth, Suppl. PI. Succ. 83. 1819. 



Cactus fasciculatus Willdenow, Enum. PI. Suppl. 33. 1813. 



Rhipsalis horrida Baker, Journ. Linn. Soc. 21: 347. 1884. 



Rhipsalis madagascaretisis Weber, Ind. Sem. Hort. Paris 1889; Rev. Hort. 64: 424. 1892. 



Hariota fasciculata Kuntze, Rev. Gen. PI. i: 262. 1891. 



Hariota horrida Kuntze, Rev. Gen. PI. i: 263. 1891. 



Stems woody, terete, much branched; branchlets clavate to cylindric, faintly ribbed when old, 

 4 mm. in diameter, with numerous areoles, each with a cluster of fragile hairs 3 to 4 mm. long; 

 flowers lateral but not described; ovary not sunken in the branch; fruit globose, small, bearing a 

 few areoles, these pubescent and setose. 



Type locality: Not cited. 



Distribution: Brazil and Madagascar. 



We have studied Madagascan specimens of this plant sent from Kew and one sent 

 from Bahia, Brazil, to Dr. Rose by L- Zehntner in 1920. De Candolle (Plantes Grasses i : 

 pi. 59) states that it occurred in Santo Domingo. Roland-Gosselin* says that it inhabits 

 American Islands ; our very extensive explorations in the West Indies have failed to dis- 

 cover it. The Brazilian plant differs only from the Madagascan by having fewer hairs at 

 the areoles. 



Rhipsalis pilosa Weber is listed by Schumann (Martins, Fl. Bras. 4^: 300. 1890) with 

 the statement that it occurs in P. Rebut's Catalogue without description; A. Berger in a let- 

 ter (dated March 7,1920) states that this name is said to be a synonym of R. madagascarensis. 

 It is illustrated (MoUers Deutsche Gart. Zeit. 25: 477. f. ir, No. 20). Rhipsalis 

 madagascarensis dasycerca Weber is listed by R. Lamb (Collection of Cacti 73. 1908.) 



Illustrations: De Candolle, PI. Succ. i: pi. 59, as Cactus parasiticus; Curtis's Bot. 

 Mag. 58: pi. 3079; Gartenwelt 13: 117, Ann. Inst. Roy. Hort. Fromont 2: pi. i, f. G, as 

 R. fasciculata; Loudon, Encycl. Pi. 413. f. 6908. as R. parasitica. 



17. RhipsaUs pulchra Lofgren, Arch. Jard. Bot. Rio de Janeiro i: 75. 1915. 



Stems much branched, often pendent; branches often in whorls of 3's or 4's, 3 to 4 mm. in 

 diameter, bright green ; areoles minute, reddish ; flowers few, usually from near the tips of terminal 

 branches, purplish red, large, 12 to 14 mm. long; petals oblong, obtuse; stigma-lobes white; ovary 

 purplish red. 



Type locality: Serra da Mantiqueira, Brazil. 

 Distribution: State of Rio de Janeiro. 



*Bull. Soc. Bot. France 59: 99. 



