20 UNITED STATES AND MEXICAN BOUNDARY. 
downward. All the specimens grew well at first, one flowered abundantly, but all soon died 
from an internal rot, just as all the specimens of £. uncinatus did, though they were treated 
like the other Cactaceee from the same region, which are doing well. Areolz 2 lines in 
diameter, 8-12 lines distant, connected with the floriferous areole in the axils of the tubercles 
by a tomentose groove of 4 or 5 lines length. Radial spines almost always 12, very rarely 1 or 
2 more, 5-10 lines long, upper ones longer than the lower, and light colored, lateral ones 
darker when young, but difference of shade soon lost; upper central spine 8-10 lines long, 
lateral ones usually 14-22 lines in length, always exceeding the upper and lower one; this 
last one is the stoutest and broadest of all, 9-14 lines long, mostly yellowish-brown, darker on 
the upper, lighter on the lower surface, and with the hook brown or black; rarely 1 or 2 addi- 
tional central spines are noticed. Flower 12-16 lines long, only 9 or 10 lines wide when fully 
open at noon ; petals 7-8 lines long, 2 lines wide, pale rose colored, with a deeper colored mid- 
rib, Fruit and seed unknown.—Near the last species, distinguished by thé larger size, the 
very different root, the smaller number of radial spines, the shortness of the upper central 
spine, and the red color of the flowers; other differences will no doubt be found in fruit and 
seed. Name from the shortness of the hook, by which the species is distinguished from most 
other allied forms. 
3. E. uncrnatus, Hepf., var? Wricutir: glaucescens, ovatus; costis 18 compressis tubercu- 
latis supra usque ad basin sulcatis; areolis ovato-orbiculatis, junioribus albo-lanatis; aculeis 
radialibus 8, inferioribus 3 brevioribus teretibus uncinatis purpureo-fuscis, ceteris 5 compressis 
rectis infra stramineis sursum rubellis apice fuscis, summis longioribus latioribusque, centrali 
singulo complanato basi angulato flexuoso elongato hamato erecto stramineo apice fusco ; flori- 
bus ex areola penitus axillari ortis; sepalis inferioribus 25-30 imbricatis squameformibus e 
basi longe auriculata triangularibus hyalinis, superioribus 15-25 ovato-orbiculatis cordatis 
acutis purpurascentibus, superioribus 18-20 lineari-oblongis obtusis purpureo-fuscis, sepalis 
omnibus margine membranaceo albido ciliatis; petalis 20-30 lineari-lanceolatis obtusiusculis 
_purpureis, internis mucronatis denticulatis ; stylo supra stamina numerosissima exserto stig- 
matibus 10 carneis suberectis ; bacca ovata rubella; seminibus curvatis oblique obovatis tuber- 
culatis hilo circulari basilari. (Tab. LXXIV, fig. 10.) 
Near El Paso, and on the river below, also at Eagle springs, on stony hills and nearly to the 
top of the mountains, commonly in tufts of grass or hidden among low bushes, Wright, Bige- 
low: fl. in March and April.—Oval, 3-6 inches high, 2-33 inches in diameter, with a long 
tuft of the whitish hooked central spines, which are at first difficult to distinguish from the sur- 
rounding bunches of dead grass. The adult plants have generally 3, very rarely 4 lower hooked 
radial spines, }-14 inch long; 5 lateral and upper radial spines 1-14 inch long, paler and 
flattened ; the uppermost one longer, broader, and whiter than the rest; sometimes I find 
6 upper spines, when the 3 outer and more slender ones appear radial, and the 3 inner and 
stouter ones assume the position of 3 upper central spines ; there are then 6 radial and 4 central 
spines. ‘The hooked central spine is 2-4 inches long, and not annulated. Young plants have 
6-7 radial and 1 central spine, all terete and purplish, with darker tips, all 4-1 inch long ; 
in older specimens, the central spine elongates, and finally becomes flattened and whitish. 
Groove on the tubercles 2-3 lines long, so that the axillary flower is distant thus far from the 
spines; flower 1-1} inch long, dark purplish-red, Opening at midday in bright sunshine; 
filaments at least 1000, yellow below, orange at tip. Fruit ovate 8-12 lines long, pulpy red, 
- 
