OP ARTS AND SCIENCES. Ill 



(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. 181 G). 

 Both of these jilants have been referred through some oversight to 

 G. radulicefolia, 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. C. platylepis evidently stands 

 close to C. cervarioefolius^ 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-ll-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, 1\ 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 Tolucanus. Radical leaves lance-oblong, acute, about 

 25-lobed, green and strigose-pubescent above, much paler and some- 

 what arachnoid beneath, 7-10 inches long, l|-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, 1 \-'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 cafions, Sierra de las Cruces, State of Mexico 

 August, 1892 (n. 4308). 



