i8 



THE . CACTACEAE. 



about 2 dm. apart; ribs usually 9 or 10, rather low for this genus, about 1 cm. high; areoles 5 to 15 

 cm. apart, small; spines numerous, gray, acicular, the longest ones 5 cm. long; flowers nocturnal, 

 narrowly funnelform, 7 to 8 cm. long, the limb 2.5 to 3 cm. broad, dark green except tips of inner 

 perianth-segments ; ovary bearing a few small ovate scales with a little felt in their axils ; fruit dark 

 red (occasionally white), oblong, 3 to 4 cm. long, with white flesh; seeds dull black, tuberculate 



Type locality: Tropical America. 



Distribution: Curacao, Aruba, and Bonaire. 



Schumann (Engler and Prantl, Pflanzenfam. 3 6a : 181) has confused this species with 

 Cephalocereus lanuginosus and has published it under Pilocereus repandus. 



Common on Curacao, where it often 

 grows in thickets, sometimes forming the 

 dominant feature of the landscape and there 

 known as kadoesji and breebee. 



Figure 18 shows a fruit of a plant on 

 Curacao; figure 19 is from a photograph of 

 the same plant taken by Dr. Britton and Dr. 

 Shafer in 1913. 



Fig. 17. — Fruiting branch 

 of Cereus aethiops. Xo.6. 



Fig. 18. — Fruit of Cereus 

 repandus. Xo.6. 



Fig. 19. — Cereus repandus. 



23. Cereus grenadensis sp. nov. (See Appendix, p. 223.) 



24. Cereus margaritensis Johnston, Proc. Amer. Acad. 40: 693. 1905. 



Stem columnar, erect, 5 to 8 meters high, with a trunk 1 to 2 meters long ; branches ascending, 

 gray; ribs usually 8; areoles 1 cm. apart or less; spines 11 to 15, somewhat swollen at base; radial 

 spines about 10, acicular, 5 to 10 cm. long, spreading or reflexed; central spines 1 to 3, stouter and 

 twice as long as the radials, porrect or reflexed; flower-bud obtuse; flowers 5 to 6 cm. long; fruit 

 oblong, 4 cm. long; seeds black, covered with blunt tubercles. 



Type locality: El Valle, Margarita Island, Venezuela. 

 Distribution: Known only from Margarita Island. 



OTHER SPECIES DESCRIBED AS BELONGING TO THE GENUS CEREUS. 



The following species have been described under Cereus, but their flowers are unknown 

 or incompletely described : 



CEREUS benEckei Ehrenberg, Bot. Zeit. 2: 835. 1844. 



Cereus farinosns Haage in Salm-Dyck, AUg. Gartenz. 13: 355. 1845. 

 Cereus beneckei farinosns Salm-Dyck, Cact. Hort. Dyck. 1849. 48. 1850. 

 Piptanthocereus beneckei Riccobono, Boll. R. Ort. Bot. Palermo 8: 226. 1909. 



Plants 4 to 5 meters high, much branched; branches 6 to 7. cm. in diameter, the growing tips 

 glaucous; ribs 8, strongly tuberculate, obtuse, separated by narrow intervals; areoles small, borne 



