HARRISIA. 



157 



This species has only once been reported as flowering, and then by Riccobono; our 

 description of the flowers is based on his. We have studied a small plant in the collection 

 of the New York Botanical Garden. 



Illustration: Schumann, Gesamtb. Kakteen f. 19, as Cereus platygonus. 



16. Harrisia bonplandii (Parmentier). 



Circus bonplandii Parmentier in Pfeiffer, Knum. Cact. 108. 1837. 

 Cereus baiansaei Schumann in Martins, Fl. Bras. 4 2 : 210. 1890. 

 Eriocercus bonplandii Riccobono, Boll. R. Ort. Bot. Palermo 8: 238. 1909. 



Stems slender and weak, at first erect, up. to 3 meters high or more, sometimes procumbent, 

 arching or clambering, 3 to 8 em. in diameter, strongly 4-angled; areoles 2 cm. apart; spines 6 to 8, 

 acicular, the longest 4 cm. long, when young red, in age gray; flowers 15 to 22 cm. long, white, closing 

 soon after sunrise; filaments numerous, borne almost to the base of the tube; style included; stigma- 

 lobes numerous; fruit edible, globular, 4 to 6 cm. in diameter, red, bearing large scales with hairs 

 in their axils, spineless, splitting on the side and exposing the white flesh and black seeds. 



Fig. 227. — Harrisia bonplandii. 



Type locality: Brazil. 



Distribution: Paraguay, Argentina, and Brazil. 



This species is widely cultivated, but under different names, one of which is Cereus 

 acutangulus. The only specimens from wild plants which we have seen were collected by 

 Thomas Morong at Trinidad, Paraguay, and by J. A. Shafer at Ascencion, Paraguay, and 

 at Salta, Argentina. Cereus bonplandii brevispinus (Maass, Monatsschr. Kakteenk. 15:119. 

 1905) is only mentioned, but Mr. Weingart says it is identical with the hybrid Cereus jusbertii. 



vSchumann's treatment of Cereus baiansaei is confusing. In the Gesamtbeschreibung 

 der Kakteen (p. 136) he refers it to Cereus bonplandii. In the Nachtrage (p. 45) he puts 



