434 
depressed, with yellow wool, very slender and short at length very 
numerous reddish-brown bristles, and caducous bristly spines (but no 
spines proper): flowers rich-purple (reported as sometimes white), 6em, 
broad: fruit short-obovate, with broad umbilicus, dry, pubescent: 
seeds large, thick, subregular, with rather narrow but very thick mar- 
gin, 6 to 10 mm. broad, (ll. Pacif. R. Rep. t. 13, f. 1-5; t. 23, f. 14)— 
Type, the Bigelow, Schott, and Campbell specimens in Herb. Mo. Bot. 
Gard. 
From southern Utah and Nevada (Silver Peak region) southward 
through western Arizona and southeastern California into Sonora. 
Specimens examined: Uran (Gabb of 1867): ARIZONA (Bigelow of 
1854; Schott of 1855, on the Lower Gila; Campbell of 1855; Newberry 
of 1858; Palmer of 1869; Rusby of 1883; Toumey of 1892, Yuma): 
JALIFORNIA (Schott 2 of 1855; Hayden of 1858; A. H. Janvier of 1873, 
Ehrenberg; Palmer of 1876; Weber of 1877; Engelmann of 1880; G. 
R. Vasey, Whitewater; Nevin of 1882; Trelesse of 1892), 
Dr. Merriam says that this species is one of the commonest cactuses of the Sono- 
ran deserts. Its apperance is quite characteristic, a large number of joints of dif-, 
ferent shapes (obovate, fan-shaped, obcordate, emarginate, elongated or almost 
oblanceolate) issuing from the base at nearly the same point, forming a sort of rosette 
“resembling somewhat an open cabbage head.” 
47. Opuntia basilaris ramosa Parish, Bull. Tort. Club, xix, 92 (1892), 
“Spreading, the joints freely branching above; joints and fruit ¢la- 
8; . y 8 7, g 
brous”—T ype, in Herb, Parish. 
Dry washes and gravelly benches of the Colorado and Mojave deserts. 
Specimens examined: CALIFORNIA (Parish Bros. of 1882, White- 
water). 
Mr. Parish has called attention to the fact that this is the common form of the 
species in southern California, and says that only near the summit of the Cajon Pass 
has he seen plants branching at the base. If this be true, doubtless many of the 
specimens referred above to basilaris are ramosa, but there seems to be no way of 
separating them by the characters of single isolated joints. It is probably also true 
that this very abundant cactus will be found throughout its range to show both 
habits of branching, which must give rise to plants of very different appearance, 
The specimen cited above as having been examined shows but a single joint, but the 
joint and fruit are glabrous. I doubt whether the pubescent character will hold, as 
Thave a glabrous joint with pubescent fruit. 
48. Opuntia treleasii, sp. nov. 
Erect, diffusely branching: joints orbieular to obovate, fleshy, with 
terete base, 15 to 25 em. long: pulvini not depressed, with long (5 em.) 
dense dirty-yellow bristles: leaves on young shoots 5 mm. long, spread- 
ing (more than twice as long as those of basilaris and darker-red): flower 
and fruit not seen.—Type, growing in Mo. Bot. Gard. 1893, from collec- 
tion made by Trelease in 1892, 
At Caliente, in the Tehachapi Mountains, California. 
Specimens examined: CALIFORNIA (Trelease of 1892), 
