393 
ARIZONA (Pringle of 1881): CoAHUILA ( Wislizenus of 1847; Gregg 
400, 616, of 1847; Poselger of 1853): CHIHUAHUA ( Wislizenus 244 of 
1847): also specimens cultivated in Hort. Schafer in 1857; and growing 
in Missouri Botanic Garden in 1893, 
The species is very cespitose, with a wrinkled or withered appearance even in full 
growth. The central spine is very variable in size, color, and shape; the younger 
ones being generally terete, yellowish or brownish and at length ashy, while the 
mature ones are mostly triangular or flattened and white. 
30. Cereus mojavensis lngelm. Syn. Cact. 281 (1856). 
Ovate, glaucous, 5 to 7.5 em, high, densely cespitose, forming large 
masses: ribs 8 to 12, rather obtuse and slightly tuberculate, with 
areole 12 mm. or moreapart: spines stout, very bulbous at base, terete 
or angular, curved and interlocked, white with faintly dusky tips, 
becoming ashy-gray; radials 5 to 8, upper and lower weaker, 2 to 3em, 
long (upper occasionally much shorter), lateral stouter and 3 to 5 em, 
long; central 1 (sometimes wanting), angular and dusky, curved 
upward, 3.5 to 6 em. long: flowers deep rich crimson, 5 to 7 em. long: 
fruit oblong, 2.5 to3em. long: seed obliquely obovate, black and pitted, 
2mm. long. (ll. Pacif. R. Rep. iv, t. 4, f 8)—Type, Bigelow of 1854, 
in Herb. Mo. Bot. Gard. 
From the Mohave region of California to Utah and the western 
border of New Mexico, 
Specimeus examined: CALIFORNIA (Bigelow of 1854; Parish Brothers 
1167, 1243; Trelease of 1892): NEVADA (Coville & Funston 321, Lincoln 
Co.): ARIZONA (Palmer 136, Fort Detiance). 
The species is easily distinguished from the nearly allied fendleri by the longer 
radial spines, the lowest of which is weakest, and the glaucous hue. The longspines 
are so curved and interlocked as almost to hide the body of the plant. Mr. Coville, 
to whom we are indebted for a description of the flower, in the Death Valley Expe- 
dition measured one large clump in the Panamint Mountains, which formed a dense 
oblong mat with the center elevated about & inches, with the greatest diameter 40 
inches, the shortest 30 inches, and the unusually small and closely packed heads 
estimated to be about 600. 
31. Cereus mojavensis zuniensis Engelm. Syn. Cact. 281 (1856). 
Spines weaker, 4-angled, straight or flexuous, the younger ones 
straw-colored, older ones ashy; radials 8, lowest 12 to 18 mm. long, 
lateral 18 to 30 mm., uppermost almost as stout and long (2.5 to 3.5 
em.) as the central, which is straight or curved upward, and 3.5 to 5 
em.long. (Jil. Pacit. R. Rep. t.4, ££9)—Type, Bigelow of 1853 in Herb. 
Mo. Bot. Gard. 
‘Canyon Diablo, on the Colorado Chiquito,” Arizona. 
Specimens examined: ARIZONA (Bigelow of 1853), 
Distinguished by the long and stout upper radial. 
+ + Flowers scarlet. 
+ Ribs 5 to 7: central spine 7 (or wanting in paucispinus), 
32. Cereus paucispinus Engelm, Syn. Cact. 285 (1856). 
Ovate or ovate-cylindrical, 12.5 to 22.5 cm. high, 5 to 10 cm, in 
diameter, simple or sparingly branched, deep-green: ribs 5 to 7, tuber- 
