156 



THE CACTACEAE. 



trunk 2 to 4 cm. in diameter, with a woody cylinder, its center coarsely pithy; areoles large, rounded, 

 subtended by small definite leaves like those of Opuntia; spines usually io, stout, 2 to 3 cm. long, 

 swollen at base, when young brownish or yellowish with brown tips; flowers 15 to 18 cm. long, open- 

 ing at night ; perianth-segments white ; ovary bearing lanceolate acute scales with long hairs in their 

 axils; fruit red, globular, tuberculate, 5 to 6 cm. in diameter, spineless, bearing scales and felt at the 

 areoles, when mature splitting down on one side; flesh white, juicy; seeds large, black, 3 mm. long. 



Fig. 225. — Harrisia pomanensis. 



Fig. 226. — Harrisia adscendens. 



Type locality: Near Tambury, Bahia, Brazil. 

 Distribution: In the subarid parts of the state of Bahia, Brazil. 



Dr. Rose found this very common in Bahia, Brazil, either growing as a low bush in 

 the open or clambering through bushes (No. 19730). 



Illustration: Monatsschr. Kakteenk. 18: 67, as Cereus adscendens. 



Figure 226 is from a photograph taken by Paul G. Russell at Barrinha, Bahia, in 1915. 



15. Harrisia platygona (Otto). 



Cereus platygonus Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 199. 1850. 

 Eriocereus platygonus Riccobono, Boll. R. Ort. Bot. Palermo 8: 242. 1909. 



At first erect, but soon spreading; branches slender, 2 cm. in diameter or more, nearly terete, 

 the 6 to 8 ribs flat or hardly elevated, separated only by shallow, narrow depressions, pale green or 

 somewhat bronzed; spines 12 to 15, setaceous, very short, the longest only 12 mm. long; flowers 

 12 cm. broad; flower-tube 10 cm. long, bearing scales; ovary tuberculate, bearing scales, these 

 woolly in their axils; stigma-lobes 14, linear. 



Type locality: Not cited. 



Distribution: Not known, probably South America. 



