THE CACTACEAK. 



from the lower part of the areole; central spine single or rarely 2 or 3, stouter than the radials, 

 sometimes 16 cm. long; flowers funnelform; outer perianth-segments reddish, obtuse, the inner 

 white or reddish; style green below; stigma-lobes about 16. 



Type locality: Not cited. 



Distribution: Provinces of Cordoba, Catamarca, and Tucuman, Argentina. 



Cereus labouretianus Martius and C. haematuricus Weber, mentioned by Schumann, are 

 only catalogue names and should not go into the published synonymy of this species. 



Illustration: Bliihende Kakteen 2: pi. 114, as C. hankeanus. 



Plate in, figure 1, shows the top of a plant in the New York Botanical Garden, received 

 from Kew in 191 1 ; figure 2 shows a joint and a flower of a plant received from I^a Mortola 

 as Cereus hankeanus. Text-figure 7 is from a photograph of a plant in the same collec- 

 tion, received from the Missouri Botanical Garden in 1904. 



5. Cereus jamacaru De Candolle, Prodr. 3 : 467. 1828. 



Cereus glaucus Salm-Dyck, Hort. Dyck. 335. 1834. 



Cereus laetevirens Salm-Dyck, Hort. Dyck. 336. 1834. 



Cereus lividus Pfeiffer, Allg. Gartenz. 3: 380. 1835. 



Cactus jamacaru Kosteletzky, Allg. Med. Pharm. Fl. 4: 1393. 1835. 



Cereus horribarbis Otto in Salm-Dyck, Cact. Hort. Dyck. 1849. 205. 1850. 



Cereus cauchinii Rebut in Schumann, Gesamtb. Kakteen 1 13. 1897. 



Piptanthocereus jamacaru Riccobono, Boll. R. Ort. Bot. Palermo 8: 229. 1909. 



Piptantkocereus jamacaru cyaneus Riccobono, Boll. R. Ort. Bot. Palermo 8: 230. 1909. 



Piptanthocereus jamacaru glaucus Riccobono, Boll. R. Ort. Bot. Palermo 8: 231. 1909. 



Plant up to 10 meters high, with a short, 

 thick, woody trunk, very much branched, 

 the branches usually erect, numerous, often 

 forming a compact top, when young often 

 quite blue, with few (4 to 6) ribs ; ribs of 

 young branches thin, high, more or less 

 undulate; areoles large, 2 to 3 cm. apart; 

 spines various, on old stems and branches 

 numerous, at first yellow, often very long, 

 20 to 30 cm. long; flowers nocturnal, large, 30 

 cm. long, white; ovary purplish, bearing a 

 few minute brown scales; stigma-lobes nu- 

 merous, 2 cm. long; fruit large, sometimes 12 

 cm. long by 8 cm. in diameter, bright red, 

 splitting down on one side showing the 

 white edible pulp; seeds 3 mm. long, dull, 

 roughened with blunt tubercles. 



Type locality: Brazil. 



Distribution: Brazil. Planted in the 

 West Indies; perhaps naturalized on 

 some islands. 



Cereus jamacaru is one of the 

 commonest cacti in Bahia and is found 

 in all kinds of situations from the coast 

 to the inland desert. It is always large, 

 10 meters tall or more, usually much 

 branched. When living in dense for- 

 ests it has a simple stem or only a few 

 branches, growing tall and erect, the 

 branches have few ribs, but these are 

 high and at first very blue, covered with 

 formidable spines said to be 30 cm. long 

 at times, although we have seen none 



