40S 
+--+ Procumbent, 3 to 12 dm. long. 
++ Ribs 3. 
55. Cereus grandiflorus (L.) Mill. Dict. ed. 8, no. 11 (1768). 
Cactus grandiflorus L, Sp. Pl. i, 467 (1753). 
Creeping, diffuse, pale-green, with very long and flexuous climbing 
5- to 7-angled branches 12 to 20 mm. in diameter, with white bristly 
areole 10 to 15 mm, apart: spines short, 4 to 6 mm long; radials 4 to 8, 
scarcely pungent, yellowish or white; centrals 1 to 4, equaling in length 
the white bristles: flowers white and fragrant, 15 to 20 em. broad.— 
Type unknown. 
In the West Indies and Sonora, though doubtless with a much more 
southern Mexican extension. On rocks and decayed trees. 
Specimens examined: SonorA (Schott of 1859 and 1865): also eulti- 
vated in Hort. Francofurt. in 1825; in Hort. Genéve in 1859; in Goebel’s 
Gard. in 1860; in Harvard Bot. Gard. in 1864, 1865, 1882, 
Long cultivated in gardens as the ‘‘night-blooming cereus,” and made to vary 
widely. 
56. Cereus nycticalus Link, Verh. Preuss. Gartenb. Ver. x, 373 (1834), 
Cereus pteranthus Link, Otto & Diet. Allg. Gart. Zeit. ii, 209 (1834). 
Suberect, very long-jointed, radicant, 15 to 25 mm, in diameter; joints 
various, some subeylindrical with 4 or 5 series of areolie, others 4- to 
6-angular: ribs when young acute, later obtuse, with areole 8 to 20 mm, 
apart: spines | to 4, very small (2 to 4 mm.) and rigid, sometimes with 
white sete 4 to 6mm. long, often deciduous: flowers white and fragrant, 
17.5 em. long. (Jil. 1. ¢. t. 4)—Type unknown, 
Credited in general to Mexico, but no definite station known. 
Specimens examined: cultivated in Greeve’s Gard, in 1859; in 
Goebel’s Gard, in 1860; in Harvard Bot. Gard. in 1871; in Mo, Bot. 
Gard. in 1862, and growing in same garden in 1893. 
57. Cereus napoleonis Graham in Hook. Bot. Mag. t. 3458 (1836). 
Cactus napoleonis Hort. ex Graham, 1. ¢. 
Cereus triangularis major Pfeiff. Fnum. 117 (1887). 
Suberect, long-jointed; joints triquetrous with flat sides, slender, 
30 em. or more long, 20 to 25 mm. in diameter: ribs acute, undulate, 
with areole 12 to 16 mm. apart and scarcely tomentose: spines 3 or 4, 
subulate, unequal, straight, black, 8 to 16 mm. long, the lowest mostly 
longest; sometimes a few white sete: flowers snowy white, 20 cm. long 
and 15 em. broad: fruit bluish, spiny, 10 em. long and 8 em. in diameter. 
(Til. 1. e.)—Type unknown. 
Tamaulipas and southward in Mexico, and in the West Indies. 
Specimens examined: TAMAULIPAS (Poselger of 1850, at Tampico): 
also cultivated in Harvard Bot. Gard. in 1582. 
58. Cereus compressus Mill. Gard. Dict. ed. 8, no, 10 (1768). 
Cereus triangularis Haw. Syn. 180 (1812), not (L.) Mill. (1768). ; 
Suberect, bright-green, branching, the branches scandent, radicant, 
triquetrous with one face nearly ilat and the other two deeply sulcate; 
