206 COMPOSITE. (composite family.) 



«- +- Less leafy: cauline leaves I or 2 (rarely 3) pairs, and the upper mostly 



6. A. Parryi, Gray. A foot or less high, slender, simple, somewhat hir- 

 sutely pubescent and abova glandular : leaves membranaceous, commonly den- 

 ticulate ; radical oval to ovate-oblong, 1 to 3 inches long, abruptly or cuneately 

 contracted at base into a short margined petiole ; cauline remote : involucre hir- 

 sute and glandular, | inch or less high: heads rayless, occasionally some 

 outermost corollas ampliate : alcenes glabrous or with a few sparse hairs. — 

 Am. Nat. viii. 213. A. angustifolia, var. eradiata, Gray. Mountains from 

 Colorado to Wyoming and westward. 



7. A. alpina, Olin. A span to 18 inches high, pubescent, hirsute, or at 

 summit villous, strict, simple and monocephalous, occasionally 3-cephalous: 

 leaves thickish, from narrowly oblong to lanceolate, or the radical oblong -spatulate 

 and small uppermost linear, entire or denticulate, 3-nerved ; bases of the cau- 

 line hardly at all connate : heads conspicuously radiate : alcenes hirsute-pubescent, 

 rarely glabrate. — A. angustifolia, Vahl. • In the mountains of Colorado and 

 California ; across the continent in high latitudes. 



70. SBNECIO, Tourn. Groundsel. 



A very large genus; with alternate leaves aud heads of yellow flowers. 

 Ours all belong to the section of perennials having the pubescence (if any) of 

 a tomentose or floccose kind and never viscid nor hirsute. 



* Heads an inch or distinctly over £ inch high, very many-flowered. 

 t~ Heads radiate. 

 ** Alpine species. 



1. S. Soldanella, Gray. Apparently glabrous from the first, a span high, 

 somewhat succulent : leaves mostly radical and long-petioled, from round-reni- 

 form to spatulate-obovate, denticulate or entire ; cauline one or two or none : head 

 solitary, erect, two thirds to nearly a full inch high : involucral bracts lan- 

 ceolate and a very few calyculate ones : rays 6 to 10, oblong, a quarter-inch 

 long. — Proc. Acad. Philad. 1863, 67. High alpine, in the mountains of 

 Colorado. 



2. S. ampleetens, Gray. Lightly fioccose-woolly at first, soon glabrate, 

 a foot or so high, yew to several-leaved, terminated by one or two long-pedun- 

 culate nodding heads : leaves thinner than in the foregoing, from denticulate to 

 conspicuously and sharply dentate ; radical obovate to spatulate, tapering into a 

 winged petiole ; cauline as large or larger, oblong or narrower, half-clasping 

 or more, the upper by a broad base : involucre over half-inch high, of linear 

 bracts and a few loose calyculate ones : rays linear, inch long or more, acute or 

 acutely 2 to 3-toothed at tip. — Am. Jour. Sci. n. xxxiii. 240. Alpine and 

 subalpine region, mountains of Colorado. 



Var. taraxacoides, Gray. Only a span or two high, with fewer and 

 smaller cauline leavjs ; these and the radical commonly spatulate and with 

 tapering base, not rarely laciniately subpinnatifid : head smaller, even down 

 to half-inch, and with rays of only the same length. — Proc. Acad. Philad, 

 1863, 67. High alpine, in the mountains of Colorado and Nevada. 



