405 
61. Cereus flagelliformis (l..) Mill. Dict. ed. 8, no. 12 (1768). 
Cactus flagelliformis L. Sp. Pl. i, 467 (1753). 
Creeping or pendent, slender and very branching, cylindrical, 16 to 
20 nm. in diameter, branches 3 din. long or more: ribs 10 to 12, tuber- 
culate, with areole scarcely tomentose and 6 to 8mm, apart: spines 
short (4 to6 mm.) and rather rigid; radials 8 to 12, stellate and reddish- 
brown; centrals 3 or 4, a little larger, brown with golden tip; young 
spines all red: flowers funnelform, crimson, 6 to 7.9 em, long: fruit 
elobose, 12 mm, in diameter, reddish and bristly, the pulp greenish- 
yellow (“with the taste of a prune”).—Type unknown. 
From Chihuahua and the West Indies southward; widely distributed 
in Tropical America, and frequently seen as an ornamental plant. 
Specimens examined: CHMUAHUA (Wislizenus 227 and 248): also 
cultivated in Mo. Bot. Gard. in 1854; in Goebel’s Gard. in 1863; in Har- 
vard Bot. Gard. in 1867. 
a+ ++ ++ Ribs many (15 to 21): spines numerous (20 to 50). 
62. Cereus emoryi Engelm. Amer. Jour. Sci. ser, 2, xiv, 338 (1852). 
Prostrate, cylindrical, 6 to 12 dm. long, with ascending or erect 
branches 15 to 25 em. high and 3.5 to 5 em, in diameter: ribs 15, tuber- 
culate, with acute intervals and areole 6 to 8 mm, apart: spines 
straight, slender and rigid, yellow, interlocked ; radials 40 to 50, very 
slender and stellately porrect; central solitary, stouter and much larger: 
flowers greenish-yellow, 3 to 6 cm, broad: fruit globose, very spiny, 3.9 
em. in diameter: seeds obovate, acutely keeled, shining and very 
minutely tuberculate, 2.4 to 2.8 mm. long. (//l, Cact. Mex. Bound. t. 
60, f. 1-4)—Type, Parry of 1850 in Herb, Mo, Bot. Gard. 
On rocky hills, ete., from southern California (about Los Angeles and 
San Diego) southward into Lower California, and on the adjacent islands 
(San Clemente, Santa Catalina, Cedros). 
Specimens examined: CALIFORNIA (Parry of 1850; Cooper of 1862; 
Childs of 1862; Bremer 248; Agassiz of 1572; Hitchcock of 1875; near 
San Diego, no collector noted, in 1876); LOWER CALIFORNIA (Crabb 4 of 
1867; Pringle of 1882; Brandegee of 1889, 1] Rosario). 
Grows in thick masses, covering patches 30 to 60 dm, square, The Gabb specimens 
show four central spines, but only the lower one is long. 
63. Cereus mamillatus Engelm. MSS. 
Stems aggregated, branching at base, the branches cylindrical, 25 to 
30 em. long and 3.5 to 6 em. in diameter: ribs 20 to 29, oblique, strongly 
compressed, broken up into hemispherical tubercles: spines short and 
bulbous at base; radials 10 to 25, 3 to 12 mm. long, the lower ones the 
more robust and longer; centrals 3 or 4, 10 to 25 mm. long, the lowest 
longest and deflexed: flower and fruit unknown.—Type, Gabb 16 in 
Herb. Mo. Bot. Gard. 
“On mountain sides in gravelly loam, south of Moleje,” Lower 
California. Puke ‘ 
