OF ARTS AND SCIENCES. 111 
(immature) 1}-2 lines long, pubescent. — Collected by Dr. Edward 
Palmer on the Rio Blanco, Jalisco, October, 1886 (n. 689), and by 
Mr. Pringle on the plains of Guadalajara, November, 1888 (n. 1816). 
Both of these plants have been referred through some oversight to 
C. raduliefolia, HBK., by Drs. Gray and Watson (Proc. Am. Acad., 
XXII. 433), and distributed under this name. They must, however, 
be very distinct from that species, which has, according to the descrip- 
tion, numerous small 5-flowered heads. O. platylepis evidently stands 
close to C. cervariefolius, DC., but is amply distinct in foliage and 
size of the heads. 
CACALIA PELTIGERA. Roots several, short, thick and tuberous: 
‘stem herbaceous, about 3 feet high, terete, purple, nearly smooth: 
leaves mostly radical, long-petioled, centrally peltate, orbicular in out- 
line, 8-12 inches in diameter, pubescent on both surfaces, especially 
upon the veins, deeply 9-11-parted with rounded sinuses; the lobes 
narrow, 2—3-parted ; the divisions attenuate, sharply and irregularly 
toothed ; the cauline leaves similar but smaller: heads small, 5—7-flow- 
ered, in a naked much branched corymb : bracts of the involucre about 
5, oblong or oblanceolate, obtusish, 3 lines in length, with narrow 
scarious margins, and usually bearing at the tip a tuft of very short 
hairs: corolla 5 lines in length ; the lobes exceeding the tube: achenes 
conspicuously striate-sulcate, nearly smooth, 2} lines long. — First 
collected by Dr. Edward Palmer on the Rio Blanco, Jalisco, in 1886 
(n. 171); then by Mr. Pringle on bluffs of a barranca near Guadala- 
jara, September, 1891 (n. 5154). The former specimen was referred 
_ by Dr. Watson (Proc. Am. Acad., XXII. 432) to C. Schaffneri, 
Gray, from which, however, it differs essentially in its short thick 
roots, centrally peltate leaves with much more attenuate segments, and 
in its nearly smooth achenes. 
Cnicus Totucanus. Radical leaves lance-oblong, acute, about 
25-lobed, green and strigose-pubescent above, much paler and some- 
what arachnoid beneath, 7-10 inches long, 1}-2 inches broad ; lobes 
ovate-oblong, acute, spinulose-dentate, gradually diminished downward: | 
the cauline leaves much reduced, not decurrent: heads nodding, usually 
solitary at the ends of long slender nearly naked branches, 14—2 inches 
in diameter: outer bracts of the involucre short, narrowly lanceolate, 
spinulose-dentate, with slender reflexed tips; the inner much longer, 
with dilated purple fimbriate unarmed tips: corollas purplish, 8 lines — 
in length, glabrous : filaments puberulent ; tails of the anthers lacerate- — 
toothed: achenes compressed, black, smooth and shining, 2 lines in 
length. — Wooded cajions, Sierra de las Cruces, State of Mexico : 
August, 1892 (n. 4308). 
