392 
or curved, lowest stoutest, white and angular, 12 to 25 mm. long, next 
2 almost as long (or longer), more terete, blackish above and white 
beneath or all blackish, then 2 white or dark or variegated, then 2 
weaker, whiter, and shorter (6 to 14 mm.), often 2 more upper spines, 
and sometimes a slender or stout dark spine (24 to 80 mm. long) on 
upper edge of areola; central 1, stout and very bulbous at base, curved 
upward, reddish-black, teretish, 2.5 to 5 em, long, rarely wanting: flow- 
ers deep violet-purple, 6 to 8.5 em. broad: fruit ovate-globose, 2.5 to 
3 em. long, purplish-green, edible: seed curved, deeply and irregularly 
pitted, 1.4 mm. long.—Type, Fendler specimens in Herb. Mo Bot. Gard. 
From Utah, southward through Arizona, New Mexico, and South- 
western Texas (extending eastward of the Pecos), into Sonora and 
Chihuahua. 
Specimens examined: UTAn ( Ward of 1875, at Glenwood): ARIZONA 
(Coues & Palmer of 1865; Pringle of 1881; Palmer 137, Ft. Defiance; 
Rusby 6195; Trelease of 1892; Toumey of 1892, Tucson; Wilcox of 1894, 
Ft. Huachuea): New Mrxico (Fendler 4, 62, 273, of 1846 and 1847; 
Wright 161 of 1849; Thurber of 1851; Newberry of 1858; Palmer 135, 
137; G. R. Vasey of 1881, Socorro; Rusby 143, 144; Pvans of 1891; B.A. 
Mearns 87 of 1892, Apache Mts.): TEXAs ( Wright 71, 75, 228, of 1851; 
Bigelow of 1852 and 1853; Trelease of 1892; Briggs of 1892): SONORA 
(Schott): CHIHUATIUA (Wright 161, 228; Bigelow of 1852 and 1853): 
also cultivated in Missouri Botanic Garden in 1853. 
A plant so variable in its spines that to include all the variations in a specific 
description is impossible. The chief distinguishing characters are the dark central 
very bulbous at base and curved upward, and the stout quadrangular lower radial. 
Pringle of 1881 from Arizona has a lower radial 2.5 to 3.5 em. long. In his Biblio- 
graphical Index Dr. Watson suggests Mamillaria fasciculata Engelm'., as a synonym; 
but as that is really a nomen nudum it should be dropped. 
29. Cereus enneacanthus Engelm. Pl. Fendl. 50 (1849). 
Echinocereus enneacanthus Engelm, Wisliz. Rep. 27 (1848). 
Ovate-cylindrical, obtuse, 7.5 to 15 em. high, 3.5 to 6 em. in diameter, 
simple or densely cespitose, bright-green: ribs 7 to 10, obtuse and 
tuberculate, with areolie 12 to 20 mm. apart: spines stout, straight, 
angled, translucent; radials 7 to 12 (mostly 8), white, upper 6 to 10 mm. 
long, lateral 10 to 24 mm., lower 16 to 32 mm.; central 1 (often 1 to 3 
additional shorter or almost equal angular ones above and diverging 
upward), teretish or angular or flattened, white or straw-colored or 
even darker, 30 to 50 mm. long: flowers bright purplish-red, 5 to 7.5 
em. long: fruit subglobose, 2 to 2.5 em. long, greenish or purplish, 
edible: seed obliquely obovate, prominently tuberculate, 1 mm. or less 
long. (ZU. Cact. Mex. Bound. t. 48, f. 2-4, and t. 49)—Type, Wislizenus 
of 1847 and Gregg of 1847 in Herb. Mo. Bot. Gard. 
From the lower Rio Grande, Texas, to El Paso, westward to Arizona 
and southward into Coahuila and Chihuahua. 
Specimens examined: TEXAS (Wislizenus of 1847; Wright of 1851, 
and 1853, nos. 4, 5, 27, 28, 31, 97, 231; Schott 852; Nealley of 1891): 
1In Emory, Rep. 156, f. 2. 
