COMPOSITE. 389 



from a branched or simple crown of a long tap-root; herbage strigose- 

 pubesceiit: leaves lanceolate to linear, mostly l-nerved, the radical 3—5 

 in. long : heads ^ in. high, solitary at summit of the leafy-bracted 

 stems, these 4 — 12 in. high, usually decumbent: bracts of involucre 

 equal; rays few and broad, white or purplish: achenes large; pappus 

 coarse. — High mountains above Donner Lake, etc., Sonnti, and more 

 abundant, as well as larger, in the mountains of W. Nevada. 



11. E. cni-yiiibosns, Nutt. Trans, Am. Phil. Soc. vii. 308 (1840). 

 Stems and leaves from a long tap-root with slightly branching crown or 

 short caudex; herbage soft-cinereous: radical leaves narrowly oblance- 

 olate, acute, entire, mostly distinctly 3-nerved, 4—8 in. long; cauline 

 many, narrower and linear: stems 4—10 in. high: heads 3 — 8, peduncled 

 and forming a corymb: involucre nearly hemispherical, l^ in. high: rays 

 40—50, white or bluish.— Common in Lassen Co., thence far northward. 



12. E. Lasseniaiius. Habit of the last, but only half as large, slender, 

 the tap-root seldom or never with branching crown, the numerous stems 

 strongly decumbent; pubescence fine but somewhat spreading: spatulate- 

 linear radical leaves only 2—3 in. long, l-nerved: heads numerous, often 

 subracemose, small; the broad white or purplish rays only about 12—18. 

 •-Mt. Dyer, and elsewhere, at considerable elevations among the moun- 

 tains bordering Lassen and Plumas counties, Mrs. Austin. 



13. E. teller, Gray. Proc. Am. Acad. xvi. 91 (1880). Silvery-whitish 

 with a fine and close pubescence : radical leaves ovate to lanceolate, 

 1:2 — 2 in. long, on slender petioles: stems several, very slender, ascend- 

 ing, bearing 2 or 3 heads: bracts of the involucre in 2 or 3 ranks: rays 

 25—30, bluish. — Crevices of rocks, in subalpiue situations about the 

 sources of the Sacramento; more common in W. Nevada. July, Aug. 



14. E. concinnus, T. & G. Fl. ii. 174 (1841). Stems few, or many and 

 densely tufted, from an entirely herbaceous tap-root, mostly very erect, 

 1 ft. high or less, usually branching above and with several heads: leaves 

 oblanceolate, thin, hirsutulous, but the stems more notably and almost 

 hispidly hirsute: heads hemispherical; disk ^3 in. broad; involucre 

 hispid; rays 50 — 80, long and narrow, white, purplish or blue; pappus 

 double, the outer of distinct subulate or even oblong paleae. — In Plumas 

 Co. and northward, east of the Sierra only. July, Aug. 



15. E. aphanactis. E. concinnus, var. aphanactis, Gray, Proc. Am. 

 Acad. vi. 540. Foliage and pubescence of the last, but only half as 

 tall and more condensed; involucre low-hemispherical, rays none; disk- 

 corollas permanently yellow, never brownish in age: exterior pappus 

 not paleaceous, but consisting of a few short bristles. — Eastern slope of 



