294 CACTACEAE. 



and 3 cm. wide; wool of the areoles of ovary and flower-tube brown, silky; 

 style greenish; ovary strongly tubercled; fruit globose, 5-6 cm. in diameter. 



On walls, persistent or spontaneous after cultivation, New Providence : — Cuba ; 

 Hispaniola ; east coast of Mexico. Queen-of-the-Night. 



2. Selenicereus grandiflorus (L.) Britten & Eose, Contr. U. S. Nat. Herb. 12: 

 430. 1909. 



Cactus grandiflorus L. Sp. PL 467. 1753. 



Cereus grandiflorus Mill. Gard. Diet. ed. 8, no. 11. 1768. 



Stems light green, but often becoming deep purple, up to 3 cm. in diameter ; 

 ribs 4-8, rather prominent but less so on the older branches; areoles small, 

 white; spines acicular, 1 cm. long or less, yellowish; deflexed bristles or hairs 

 from the lower part of the areoles several, white, often longer than the spines; 

 flowers 2 dm. long; outer perianth-segments and scales of the tube linear, 

 greenish or brownish, sometimes nearly rose-colored; inner perianth-segments 

 acute, rather broad ; style cream-colored, stout ; areoles of ovary and flower- 

 tube bearing short wool and long silky whitish hairs and white bristles; ovary 

 tubercled; fruit ovoid, about 8 cm. long. 



Thickets, Cave Cay, persistent after cultivation : — Cuba ; Jamaica. Queex-of- 

 THE-NiGHT. Often cultivated. 



5. CACTUS L. Sp. PI. 466. 1753. 



Subglobose ovoid or short-cylindric, ribbed leafless cacti, the spine- 

 bearing areoles borne on the ribs, the flowering areoles confluent into a term- 

 inal, densely woolly and bristly cephalium. Flowers Avith a cylindric tube, 

 sometimes enlarged at the base, the limb several-many-lobed, the lobes imbri- 

 cated. Stamens several or numerous, the filaments capillary, the anthers 

 oblong. Ovary smooth; style filiform; stigma-rays few or many; ovules many. 

 Fruit an obovoid or subclavate, fles-hy and juicy berry, at length protruded 

 from the cephalium, ci owned by the withering perianth. Seeds many, small, 

 black, without endosperm. About 20 species, natives of tropical America. 

 Type species: Cactus Melocactus L. 



1. Cactus intortus Mill. Gard. Diet. ed. 8, no. 2. 1768. 



Plant depressed-globose when young, when old ovoid, 3-4 dm. high and 

 often 3 dm, in diameter, rather light dull green, 15-20-ribbed, the ribs 2-4 cm. 

 high, crenate, the areoles bearing 7-13, stout subulate spines 1.5-4 cm. long; 

 cephalium at first nearly flat, at length cylindric, about 10 cm. in diameter, 

 sometimes 3 dm. high, densely white-woolly and brown-bristly; flowers pink 

 or rose, 1-1.6 cm. long; inner perianth-segmerts acute or cuspidate; fruit red 

 or rose, narrowly obovoid, 2-2.5 cm. long. 



Rocky soil. Long Island, Acklin's Island, Mariguana. East and South Caicos, 

 Turlvs Islands. Eastern Cay, Cotton Cay. Ambergris Cay. Little Inagua and Inagua : — 

 Mona to Virgin Gorda and Antigua. Recorded by Dolley as Melocactus communis 



DC. TURK'S-CAP. 



6. CORYPHANTHA Lemaire, Cact. 32. 1868. 



[Mammillarl\ Haw. Syn. PI. Succ. 177. 1812. Not iStackh. 1809.] 



iStems globose or ovoid^ tubercled. Tubercles conic or cylindric, woolly and 

 with clusters of spines at the apex. Leaves none. Flowers borne in areolae 

 at the bases of the tubercles. Calyx-tube prolonged beyond the ovary, which 



