l82 



THE CACTACEAE. 



3. Epiphyllanthus candidus (Lofgren). 



Zygocactus candidus Lofgren, Arch. Jard. Bot. Rio de Janeiro 2: 30. 1918. 



Usually epiphytic on shrubs, but sometimes growing in the shade of large boulders; joints 

 usually terete or nearly so, 2 to 4 cm. long, naked or sometimes bristly; flowers soUtary, terminal, 

 white; fruit globose, red. 



Type locality: On Itatiaya, Brazil. 



Distribution: Known only from the type locality. 



Fig. 190. — Epiphyllanthus microsphaericus. 



Fig. 191. — Epiphyllanthus candidus. 



Dr. Rose collected this species on the veny' top of Itatiaya, growing in the shade of 

 rocks (No. 20610) and in the deep cleft of the rock cap through which the ascent to the top 

 is made. 



EpiphyUiim candidum Barboso-Rodrigues (Arch. Jard. Bot. Rio de Janeiro 2: 30. 

 191 8) is only a name. 



Illustration: Arch. Jard. Bot. Rio de Janeiro 2: pi. 6, as Zygocactus candidus. 



Figure 191 is reproduced from the illustration cited above. 



3. SCHLUMBERGERA Lemaire, Rev. Hort. iv. 7 253. 1S58. 

 Similar in habit to Zygocactus; stems much branched; joints short, crenate or serrate, mostly 

 flattened; flowers purple to scarlet, regular; tube vers- short; stamens in 2 clusters, one scattered 

 over the throat, the other forming a short tube at base of flower and surrounding stjde or free at 

 base; ovary and fruit strongly 5 -angled, naked or rarely bearing areole on one of the ribs and crowned 

 by 5 more or less persistent, sepal-like scales; fruit hard, often remaining on plant for a long time. 



Type species: Epiphyllum riissellianuin Hooker. 



The taxonomic histor}^ of the two species here recognized is interesting. Schlumbergera 

 gaertneri was at first supposed to be conspecific with 5. russelliana and was made a variety 



