RHIPSALIS. 



239 



Schumann (Gesamtb. Kakteen 641. 1898) refers here as a synonym Rhipsalis ptero- 

 carpa Weber, a name which he had previously hsted in the Flora Brasiliensis (4" : 300. 1 890) . 



Plate XXX, figure i, is from a plant sent to Dr. Rose in 1914 by R. Lamb of Man- 

 chester, England, which flowered in the New York Botanical Garden in 1920. 



39. Rhipsalis linearis Schumann in Martius, Fl. Bras. 4": 296. 1890. 



Stems at first erect but afterwards spreading or prostrate, 6 to 8 dm. long, much branched; 

 branches vary narrow, serrate, narrowed at base and woody; flowers white, 16 to iS mm. long; 

 fruit white, 5 mm. in diameter. 



Type locality: Southern Brazil, but no definite locality cited. Localities in Paraguay 

 and Argentina also cited in the original place of publication. 



Distribution: Southern Brazil, Uruguay, Paraguay, and northern Argentina. 

 We know this species only from description. 



40. Rhipsalis micrantha (HBK.) De Candolle, Prodr. 3: 476. 1828. 



Cactus micranthus Humboldt, Bonpland, and Kunth, Nov. Gen. et Sp. 6: 65. 1823. 

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



Either epiphytic and pendu- 

 lous or clambering over rocks; 

 branches 3 or 4-angled or flattened, 

 5 to 8 mm. broad; areoles small, 

 remote, bearing often i to 4 bristles ; 

 flowers white, lateral, 7 mm. long 

 including the ovary; petals cream- 

 colored, spreading, obtuse; fila- 

 ments, style, and stigma-lobes 

 white; fruit 8 to 10 mm. long, 

 naked, white to reddish, globose; 

 seeds black. 



Type locality: Near Olleros, ^''^- "S-R^ipsaUs micrantha. 



formerly in Ecuador, now in northern Peru. 



Distrihution: Ecuador and northern Peru. 



Schumann describes this species as having 5 angles and cites only Humboldt's plant. 

 The original description says 3 or 4-angled or compressed. The plant which he actually 

 described is doubtless Rhipsalis sulcata, which has long passed in collections as R. micrantha. 



Dr. Rose found this species quite common in southern Ecuador and brought back 

 living specimens of it. The specimen in the New York Botanical Garden which came from 

 Berlin agrees with Schumann's description. 



Figure 228 shows a branch from the plant brought by Dr. Rose from southern Ecuador 

 in 1918 (No. 23248). 



41. RhipsaUs tonduzii Weber, Diet. Hort. Bois 1046. 1898. 



Stems giving off aerial roots freely, at first erect but branches hanging, i cm. in diameter or less, 

 normally 4 or 5-angled, sometimes 7-angled, but terminal branches often 3-angled or occasionally 

 flattened and 2-angled; branches about 10 cm. long, usually terminal but always in clusters of 2 to 

 6, pale green; areoles close together, forming notches in the branch; flowers small, 12 mm. long, 

 white; ovary exserted (Schumann says immersed); fruit globose, short-oblong, white, 7 to 10 mm. 

 long, usually on upper half of terminal branches, resembling fruit of Rhipsalis cassutha but much 

 longer, sometimes abortive and covered with hairs, thus resembling a small chestnut-bur, perhaps 

 the result of insect stings; seeds oblong, numerous, black. 



Type locality: Costa Rica. 

 Distrihution: Costa Rica but range unknown. 



This species flowered in Washington in March 19 12, in June 19 19, and again in April 

 1920; fruit was obtained July 31, 1919, and in April 1920. 



