c o M p o s IT.!:. 383 



10. A. YosemitanilS. A. adscendens, Liudl. var. Yosemilanus, Gray. 

 Twice as tall as the last, erect, far more leafy, the leaves thin aud deep 

 green, pubescence scanty or none: leaves from spatiilate- to linear- 

 lanceolate, 1% — 3 in. long, acute, entire or with a few obscure serratures 

 in the middle : heads of middle size, loosely paniculate, or more 

 frequently subcorymbose; bracts of the involucre oblong- linear or sub- 

 spatulate, more or distinctly imbricated, the green tips scarcely spread- 

 ing: rays violet. — Foothills of the eastern slope of the Sierra, and up to 

 almost subalpine elevations, in dry wooded or open ground. Very 

 distinct from the last, under which (as A. adscendens) it was placed by 

 Dr. Gray. It is also variable, some specimens by Geo. Hansen, from 

 Amador Co., being racemose and much too like what a glabrous 

 A. Menziesii might be. 



11. A. leiitns, Greene, Man. 180 (1894). Erect, slender, 4 -6 ft. high, 

 slightly succulent, glabrous except a slight pubescence under the heads, 

 and a delicately serrulate-scabrous margin to the leaves: lowest leaves 

 3 — 5 in. long, lanceolate-linear, slightly falcate, those of the flowering 

 branches straight and half -clasping at the sessile base: panicle loose and 

 ample, often a yard long, the branches loosely racemose: heads 4—5 

 lines high; involucres oblong; bracts linear, acute, appressed, green- 

 herbaceous and somewhat succulent almost throughout: rays many, 

 % in. long, light purple. — Plentiful along tidal streams in western part 

 of the Suisuu marsh; the largest and most showy of Califoruian species 

 Oct., Nov. 



* * * Ste)ns ascending, from a perennial root; heads few, glomerate or 

 interruptedly thyrsoid. 



12. A. integrifoliiis, Nutt. Trans. Am. Phil. Soc. vii. 291 (1840). 

 Stem simple, often a foot high or more, stout, ascending, purplish, spar- 

 ingly leafy: leaves firm, oblong-spatulate, the larger 3—6 in. long, the 

 smaller lanceolate, all entire: heads few, large, terminal and axillary; the 

 peduncles and imbricated herbaceous bracts of the involucre viscidly 

 glandular: heads % in. high, not broad; involiicral bi-acts few- ranked, 

 not squarrose: rays 15 — 25, bluish-purple: achenes compressed-fusiform 

 5-nerved, sparsely pubescent. — Subalpine near the summits of the north- 

 ern and middle Sierra. A peculiar species, not intimately related to any 

 other. 



* -x- * * Tall annual, open-paniculate, with many small heads. 



13. A. exilis, Ell. Sk. ii. 344 (1824). Stem erect, 2-4 ft. high, stout 

 below, above paniculately parted into many slender but rather rigid 

 branches: lowest leaves lanceolate, the upp3r linear, mostly entire: heads 



