COMPOSITE. 391 



commonly pale, and even white: pappus simple.— Frequent in alpine or 

 subalpine situations above Donner Lake, and about the headwaters of 

 the Truckee. July— Sept. 



21. E. Bloomeri, Gray, Proc. Am. Acad. vi. 540 (1865). Densely 

 tufted and low, green and glabrate, or sparsely strigose: leaves spatulate- 

 linear, or the few bract-like ones of the scape filiform: scape 2—6 in. 

 high: head almost % i^M tlie involucre campauulate, its bracts equal, 

 soft-villous or canescent: rays none: achenes glabrate; pappus simple. — 

 Stony ground among the lower mountains and elevated plains north- 

 eastward east of the Sierra. June— Aug. 



■^ -i— Leaves ternately divided; pappus simple. 



22. E, compositns, Pursh, Fl. ii. 535 (1814). More or less hirsute, 

 8 — 6 in. high : leaves with rather long and slender margined and setose- 

 ciliate petioles, the blade 1— 3-ternately divided into linear segments; 

 scapes with a few linear bracts below the middle: involucre sparsely 

 hirsute: rays 40—60, not very narrow, white or purplish. Var. disco- 

 ideas, Gray. Mostly larger than the type, and the involucre narrower; 

 rays none. — Subalpine in the Sierra Nevada. July — Sept. 



23. E. trifldus, Hook. Fl. ii. 17, t. 120 (1834). Much smaller than 

 the last, and more hirsute; leaves usually only trifid and the lobes short 

 and roimded, or the two lateral ones sometimes 2-lobed: involucre very 

 hirsute: rays few, purplish. — Alpine on Mt. Whitney, Coville. 



■=;- * * Taller, slender freely branching species; pappus double, the outer 



squanieUate. 



24. E. direrarens, T. & G. Fl. ii. 175 (1842). Finely and ciuereously 

 pubescent, diffusely branched biennial, often 1 ft. high: radical leaves 

 spatulate-obovate, the cauline almost linear, all entire, none much 

 exceeding an inch in length: heads 2 — 3 lines high; involucre hirsute; 

 rays very slender and numerous (about 100), purple: inner pappus of 

 scanty bristles, the outer of subulate squamellse. — Plant of the Rocky 

 Mountains and the Great Basin, reaching our borders in gravelly places 

 along the Truckee River. June — Aug. 



25. E. Californicus, Jepson, Bull. Torr. Club, xviii. 324 (1891). Allied 

 to the preceding but perennial, cinereously hirsutulous, 6 — 10 in. high, 

 leafy up to tbe base of the peduncles of the scattered heads: radical 

 leaves small, piunately parted into about 5 linear segments; cauline 

 narrowly oblanceolate, entire: rays 60—7.5, not very narrow, purplish: 

 pappus of conspicuous squamellae, and only 4 or 5 bristles.— Marysville 

 Buttes, Jepson. A disti?jctively Californiau and perhaps quite local 

 species. May, June. 



