COMPOSITE. 471 



petioles, these stipulately appendaged at base, the uppermost sessile, of 

 lauceolate outline and pinnatifid : heads about 6 or 8, in a dense 

 umbellate corymb: involucre 4 — 5 lines high, of 18 — 20 thin oblong- 

 lanceolate obtuse bracts: rays none. — In wet meadows east of the Sierra, 

 iu Plumas and Lassen counties and northward. May possibly be a 

 discoid variety of the <S. cymhalarioides, 'Nutt, of Oregon. 



30. S. Bolanderl, Gray, Proc. Am. Acad. vii. 362 (1868). Stems 

 slender, 6—15 in. high, from slender creeping rootstocks; herbage some- 

 what tomentose when young, glabrate in age: radical and lower cauline 

 leaves petioled and pinnately divided, of thin texture; leaflets 3 — 7, 

 rounded or cuneate, incisely and obtusely lobed, the terminal one largest 

 and sometimes subcordate: heads few, subcorymbose; involucre of 

 12—15 linear bracts: rays 4—6, yellow, 4 — 5 lines long. — Sandstone bluflFs 

 in Mendocino and Humboldt counties. 



31. S. Breweri, Davy, Eryth. iii. 116 (1895). Biennial or perennial 

 stout, erect, 2 — 3 ft. high, the stems sulcate and herbage wholly 

 glabrous: basal leaves petiolate, lyrately pinnate with cuneate or sub- 

 reniform coarsely toothed leaflets, or deeply pinnatifid; upper cauline 

 smaller, sessile, semiamplexicaul, iaciniately once or twice pinnatifid: 

 heads in an ample termmal corymbiform cluster; iuvohacres 5 — 6 lines 

 high, about 4 lines broad ; bracts 10 — 15, broad, ligbtly 2-ribbed, 

 scarious-margined: rays few, broad, light-yellow. — Gravelly hills and 

 slopes, in shaded ground, from Alameda Co. southward. 



32. S. caulanthifoliiis, Davy, 1. c. 117. Stems several from the root, 

 stout, flexuous, striate, 2—3 ft. high; herbage cinereously tomentose, the 

 foljage glabrate in age: leaves thin, the lowest from oval to oblong- 

 lanceolate, 4 — 8 in. long, cuneately tapering to a long petiole, the mar- 

 gin from incisely lobed to sinuately dentate and repand-denticulate; 

 upper smaller and subsessile, laciniate-piunatifid: heads loosely corym- 

 bose, large; involucre 4 lines high, the bracts about 15, oblong, acumi- 

 nate, often 2-ribbed, scarious-margined: rays broad: achenes glabrous, 

 linear, 5-angled and 10-striate. — Near the limestone cave at Murphy's, 

 Calaveras Co., Davy. 



33. S. eurycephalus, Gray, PI. Fendl. 109 (1849). Hoary-tomentose, 

 or in age only cinereous, the stout tufted stems 1 — 2 ft. high: lowest 

 leaves long-petioled, some simple, obovate and coarsely serrate-toothed, 

 others lyrate; the cauline sessile and lyrate-pinnatifid, the lobes or leaf- 

 lets 7 — 15, cuneate and acutely incised or cleft: heads in a loose corymb; 

 involucre campanulate, 3^ in. high and almost as broad, the linear- 

 lanceolate bracts 20 or more, rather thin, not ribbed: rays 10 — 12, elon- 



