CATALOGUE. 
119 
Opuntia hysteicina, Eng. & Big. Very similar to the preceding and 
probably only a form of it, with longer and more nnraerons gray or reddish 
spines, longer yellow bristles, and usually smaller flowers. — New Mexico ; 
between Walker and Carson Rivers, (H. Engelmann,) and Owen's Valley, 
(Gabb,) Nevada. [Found abundantly in Monitor and Thousand Spring Val- 
leys, Nevada; 5-6,000 feet altitude; July, in flower; September, in fruit. 
Flowers either purple or sulphur-yellow, scarcely smaller, w.] (436.) 
Opuntia rutila, Nutt. Similar to O. Missouriensis ; joints often larger, 
3' by 4', covered with closely set bunches of mostly radiating and deflcxed 
spines, the larger ones flattened and often twisted ; flowers rose-red ; ovary 
and dry berry spiny. — From Fillmore to St. George, Utah, (Dr. Palmer ; 
J. E. Johnson ;) a rediscovery of Nuttall's long-lost plant, who found it near 
the Green River in Southern Wyoming. 
Opuntia eeinacea. Eng. & Big. Fac. R. R Surv. 4. 47, t. 13. DiflTuse, 
ascending; joints thick, ovate, 2-2J' long, or sometimes elongated and almost 
cylindric, densely covered with clusters of 3-5 radiating spines, slender, 
J-IJ' long, very rigid, reddish-gray, with 2-4 smaller ones below; berry 
ovate, li' long, with crowded clusters of 12-20 mostly dcflexed spines, 3-6" 
long.— Near Mohave Creek, Southern California, (Bigelow.) [A specimen in 
Herb. Gray., collected by Dr. Bloomer near Virginia City, Nevada, (not seen 
by Dr. Engelmann,) may belong to this species, w.] 
Opuntia fragilis, Nutt. Joints small, ovate, compressed or tumid or 
even terete, 1-1^' long, fragile ; larger spines 4, cruciate, mostly yellowish 
brown, with 4-6 smaller white radiating ones below ; bristles few ; flowers 
smallei, yellow; fruit smaller, with 20-28 clusters of bristles, only tlio upper 
ones with a few short spines ; seeds few, regular.— On the Upper Missouri 
and Yellowstone, southward probably to New Mexico. [Found at llu. ^^ est 
base of the AVahsatch in Jordan Valley. Specimens not seen hy Dr. Engel- 
mann, but doubtless of this species, w.] (437.) 
Opuntia (Cylindeopuntia) pulchella, Eng. Low, 3 10' high, sjurad- 
ing; joints small, slender, 1-3' long, 6" thick, clavate, tubereulalcd, wiih 
bunches of straight radiating spines 6-18" long, from white to nearly l)lack, 
one or more of the inner longer ones flattened; flowers purple, W or less m 
diameter; ovary and dry berry bearing numerous flexible not barl.ed bristles.- 
Near Walker's River, Nevada, (H. Engelmann, Gabb.) [Frequent m the 
vaUeys of Western Nevada from the Trinity Mountains to Monitor \ alley ; 
