466 COMPOSITiE, 



petiole; uppermost sessile by a broad base: heads rather few and long 

 peduncled, 3^ in. high or less, subtended by some loose bractlets: rays 

 8 — 10, yellow. — On Lassen's Peak and elsewhere in the Sierra at high 

 elevations. 



• 8. S. Clarkiaims, Gray, Proc. Am. Acad. vii. 362 (1862). Glabrous, 

 stout, 3—4 ft. high: lowest leaves }/c, — 1 ft. long, petiolate, the upper half 

 as large, scarcely petiolate, all of lanceolate outline and laciniately 

 toothed or pinnatifid: heads % ^^- liigti or more and 5—20 in a sub- 

 corymbose terminal cluster; linear-acuminate bracts of the involucre 

 subtended by many loose filiform bractlets: rays 10 — 15, yellow. — Moun- 

 tain meadows in Mariposa Co., etc. 



9. S. Andliius, Nutt. Trans. Am. Phil. Soc. vii. 409 (1841). Glabrous, 

 tall, very leafy, the light-green foliage lanceolate, acute, subsessile, 

 sharply toothed or serrate: heads small and numerous, in a short and 

 subcorymbose panicle ; bractlets beneath the cylindric and narrow 

 involucre many and subulate: rays 6 — 8, about as long as the involucre. 

 — By streams along the eastern base of the Sierra, barely within the 

 State limits, but more common in Nevada, etc. July— Sept. 



10. S. triangularis, Hook. Fl. ii. 332, t. 115 (1833). Size of the last, 

 and with like yellow-green hue of herbage, but more flaccid; the leaves 

 petioled, the blade deltoid or triangular-lanceolate, or even subhastate, 

 coarsely toothed: heads rather few, corymbose: involucres cylindric, 

 many, ^ in. high: rays 6 — 12. — Species of the Rocky Mountains and 

 northern Cascades, reaching our borders northward; but not in the 

 Sierra proper, being there replaced by the following. 



11. S. trigonophyllus, Greene, Pittonia, iii. 106 (1896). Size of the 

 last, and with similar triangular outline of foliage, but herbage deep- 

 green and leaves membranaceous: heads far more numerous, only one- 

 half as large, the involucres subcampauulate rather than cylindric: 

 achenes correspondingly short, greenish at maturity.— Common at sub- 

 alpine elevations of the middle Sierra Nevada, where it has passed for 

 S. triangularis; but it is very distinct. July— Sept. 



-1— -1— Leaves largely basal, those of the stem more scattered and reduced. 

 ■>-+ Herbage glabrous, mostly glaucesceni or glaucous. 



12. S. liydrophiliis, Nutt. Trans. Am. Phil. Soc. vii. 411 (1841). 

 Stout, succulent, glabrous, glaucescent, the stems 2—4 ft. high, leafy 

 mostly at base: leaves lanceolate, the lower 5—9 in. long, with stout 

 petioles, the upper successively shorter and sessile, all more or less 



