CEREUS. 7 



This species has long been in cultivation in the New York Botanical Garden under the 

 name of Cereus alacriportanus, where it has frequently flowered. It differs somewhat from 

 the description of C. paraguayensis by Schumann in the color of the spines and closeness 

 of the areoles. 



Cereus bonaricnsis is referred here by Forster (Handb. Cact. 388. 1846) as a syn- 

 onym. Sweet also used the name (Hort. Brit. ed. 3. 283. 1839) but does not associate it 

 with this species. 



Illustrations: Chodat, Veg. Paraguay 1 : f. 90, as C. paraguayensis; Karsten, Deutsche 

 Fl. f. 501, No. 7. 



Plate 11, figure 1, shows the plant in the New York Botanical Garden above referred 

 to, which flowered in April 1915. 



Fig. 7. — Cereus validus. 



Fig. 8. — Cereus letragonus. 



4. Cereus validus Haworth, Phil. Mag. 10: 420. 1831. 



Cereus forbesii Otto in Forster, Handb. Cact. 398. 1846.* 

 Cereus hankeanus Weber in Schumann, Gesamtb. Kakteen 88. 1897. 

 Piptanthocereus forbesii Riccobono, Boll. R. Ort. Bot. Palermo 8: 228. 1909. 

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

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

 Piptanthocereus validus Riccobono, Boll. R. Ort. Bot. Palermo 8: 234. 1909. 



Shrubby, 2 meters high or more, somewhat branched, the branches 5 to 8 cm. thick, glaucous 

 when young; ribs 4 to 8, compressed, obtuse; radial spines 5, short, stout, 1 to 2 cm. long, mos tly 



*The date of publication of this name is usually given as 1845; this reference, however, is only to the use of the 

 name, without a description, in a publication of that date. 



