Senecio. COMPOSITE. 411 



Low grounds, common from Santa Barbara to San Diego, and in all the southern part of the 

 State. Heads barely or less than half an inch in length. 



* * * Hoot perennial. 

 +- Leaves or the lobes of pinnately parted leaves all linear and entire : stems often 



more or less woody at base. 



4. S. Douglasii, DC. "White with cottony wool, or becoming nearly glabrous : 

 stems in tufts, 2 to 6 or 7 feet high, the lower portion or base persistent and even 

 shrubby, leafy to the top : leaves linear, entire and acute (2 to 4 inches long and 

 less than .2 lines wide), or pinnately parted into 3 to 9 similar lobes : heads corym- 

 bose or sometimes nearly solitary terminating the branches, rather large (half to two 

 thirds of an inch long) : involucre calyculate with loose slender subulate bracts, 

 some of them little shorter than the acute or acuminate proper scales of the involu- 

 cre : rays elongated : akenes minutely cancscent. 



Gravelly or rocky banks of streams, &c, from Lake Co. southward through the State, and into 

 Arizona and Nevada. S. long Hob tis, Benth., of Mexico, to which belongs 8. filifolius, S. sparlir 

 Old v, and probably S. Riddellii, Torr. & Gray, with mostly smaller heads, more herbaceous 

 involucre, and shorter and few calyculate bracts, represents this in and eastward of the Rocky 

 Mountains, and apparently passes "into it. ,S'. Jhr/iomonlanas, DC. Prodr. vi. 429, is probably 

 another synonym, and the" " Keal del Monte " of Hamke is Monterey, California. 



+- +- Leaves broader, all or some of them pinnately parted or pinnate: rays numerous 

 or several and conspicuous : akenes glabrous. 



5. S. Bolanderi, Gray. Early glabrous : stem slender, a span to a foot or more 

 high from a slender creeping rootstock, sparsely leaved : radical and lower cauline 

 leaves petioled ami pinnately divided, thin and membranaceous ; leaflets 3 to 7, 

 roundish or cimeate, incisely and obtusely lobed, the terminal leaflet larger and 

 sometimes slightly cordate, the lower on the radical leaves often small or minute 

 and entire, on the cauline leaves stipule-like : heads few or several and corym- 

 bose: involucre nearly destitute of bracts at the base : rays 4 to 6. — Proc. Am. 

 Acad. vii. 362. 



Sandstone bluffs, Mendocino Co., Bolandcr. Cascade Mountains, Oregon, Harford anA 1< 



6. S. eurycephalus, Torr. & Gray. Floccose-woolly or early glabrous: stem 

 rather stout, 2 feet or more high : leaves pinnately parted or divided, somewhat 

 lyrate ; lobes or leaflets 7 to 15, cuneate and acutely incised or cleft, or in the upper 

 leaves becoming linear: heads mostly numerous in an ample corymb and large: 

 involucre broadly campanulate, with very few and inconspicuous calvculute bracts : 

 rays 10 to 12, elongated. —PL Fendl. 109. 



Low grounds, from S ma Co. and the Sacramento, along the Contra Costa Range, &c. A 



very large and coarse-leaved form (var. major, Gray, in Pacif. f>. Hep. iv. Ill) in Calaveras Co., 



near Murphy's, liiiji-hm: A variable s] ics, both in foliage and the size of the heads. These, 



in the larger, two thirds of an inch long and fully half an inch broad, and bearing rays half an 



inch in length: in s| inicns from Monte hiablo, in Kellogg and Harford's collection, of only 



about half that size, not larger than those of S. <•■■ 



7. S. aureus, Linn. Very loosely floccose-woolly when young, soon naked, or 

 even glabrous from the first, a foot or two high, or alpine forms smaller: radical 

 leaves or some of them entire or merely serrate, from round-cordate to oblong or 

 spatulate, slender-petioled ; the others mostly Lyrately pinnatifid or lyrate, or only 

 incisely toothed; upper sessile or partly clasping, spatulate or lanceolate: heads 



few or numerous, corymbose ( .". to 5 lines high) : involucre scarcely calyculate : rays 



8 to 12, occasionally wauling. — An exceedingly variable species ; the typical form 

 with thinnish and soon glabrous leaves, the radical ones cordate or roundish and 

 toothed, and the lowest cauline apt to be lyrate. 



Var. multilobatus, Graj (or S. multilobahts, Ton-, & Gray, PI. Fendl., and S. 

 Fendleri, Baton in Bot. King Exp. in part), if perennial, is a form with thickish 

 leases, nearly all l\ raieK or otherwise pinnatel] ported, and the heads numerous. 



