CATALOGUE. 119 



Opuntia hysteicina, Eng. & Big. Very similar to the preceding and 

 probably only a form of it, with longer and more numerous 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 deflexed 

 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. Pac. R. R. Surv. 4. 47, 1. 13. Diffuse, 

 ascending; joints thick, ovate, 2-2 1^' long, or sometimes elongated and almost 

 cylindric, densely covered with clusters of 3-5 radiating spines, slender, 

 ^-1 J' long, very rigid, reddish-gray, with 2-4 smaller ones below ; berry 

 ovate, 1^' long, with crowded clusters of 12-20 mostly deflexed 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 FEAGiLis,-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 

 smaller, yellow; fruit smaller, with 20-28 clusters of bristles, only the upper 

 ones with a few short spines ; seeds few, regular. — On the Upper Missouri 

 and Yellowstone, southward probably to New Mexico. [Found at the west 

 base of the Wahsatch in Jordan Valley. Specimens not seen by Dr. Engel- 

 mann, but doubtless of this species. w.J (437.) 



Opuntia (Cylindeopuntia) pulchella, Eng. Low, 3 10' high, spread- 

 ing; joints small, slender, 1-3' long, 6" thick, clavate, tuberculated, with 

 bunches of straight radiating spines 6-18" long, from white to nearly black, 

 one or more of the inner longer ones flattened ; flowers purple, IJ' or less in 

 diameter; ovary and dry berry bearing numerous flexible not barbed bristles. — 

 Near Walker's River, Nevada, (H. Engelmann, Gabb.) [Frequent in the 

 valleys of Western Nevada from the Trinity Mountains to Monitor Valley ; 



