Senecio. COMPOSITE. 413 



I 



numerous corymbose heads : cauline leaves lanceolate, elongated (4 to 8 inches long), 

 tapering to both ends and the lower into petioles, laciniately denta,te or even pin- 

 natifid into narrow and acute salient teeth or lobes : bracts subtending the involucre 

 almost filiform, some of them nearly equalling the numerous and narrow acute proper 

 scales: rays 10 to 15, elongated. Proc. Am. Acad. vii. 362. 



Mariposa Co., in the natural meadow at Clark's Ranch (named for the proprietor, Galen Clark, 

 Esq., Commissioner of the Mariposa Grove and Yosemite Valley), Bolandcr. Heads from half to 

 two thirds of an inch long. Teeth or lobes of the leaves horizontal, sometimes half an inch long 

 and subulate-lanceolate, sometimes very short. Kern Co.,Rothrock. 



12. B. Mendocinensis, Gray, 1. c. Beset or clothed with some loose wool 

 when young, almost glabrous with age : stem stout, 2 or 3 feet high, striate, naked 

 at summit, bearing several corymbose heads : leaves somewhat succulent, repand- 

 toothed or denticulate ; the radical and lower cauline varying from oval to lanceo- 

 late (3 to 5 inches long), mostly narrowed into margined petioles ; the upper much 

 smaller, narrowly lanceolate and sessile, and above reduced to subulate bracts : 

 calyculate bracts of the involucre slender-subulate, rather copious,' little shorter than 

 the numerous lanceolate very acuminate proper scales: rays 12 to 15, oblong, rather 

 short : akenes prismatic. 



Near the coast of Mendocino and Humboldt Counties, Bolander, Harford. Also collected 

 in Oregon by Kellogg. Heads two thirds of an inch or more in length, broad and very rnany- 

 fiowered, with thickened turbinate base or summit of peduncle, which is doubtless fleshy in the 

 manner of the allied S. intcyerrimus. Akenes prismatic and strongly striate-angled, nearly 3 

 lines long. It is this species rather than S. 1-ugzns that is to be compared with the East Asian 

 forms of S. pratensis (var. polycephalus, Regel ; S. Pierotii, Mi<]uel, &c.), which have heads of 

 about the same size, but the involucre not calyculate. 



S. IXTEGEKKIMUS, Nutt., of the mountains of Utah, Colorado, and Wyoming, perhaps also in 

 Nevada, is less tall, barely a foot or two high, with entire or finely glandular-denticulate leaves, 

 and smaller heads similarly fleshy-thickened at base. The scales of the involucre are broader 

 and rather obtuse, and the calyculate bracts much fewer and mostly short : akenes more 

 striate. 



= = Pleads smaller and narrower : involucre not over 3 or sometimes 4 lines long, 

 obscurely and sparingly calyculate. 



13. S. lugens, Richards. Clothed with a thin and loose floccose wool when 

 young, early or later glabrate, sometimes appearing as if wholly glabrous : stem from 

 a foot or less to 2 or rarely 3 feet high, bearing several or numerous closely corym- 

 bose heads : radical and lower leaves obovate-oblong and oblanceolate or rarely 

 ovate, glandular-denticulate, rarely more toothed (2 to 5 inches long), tapering into 

 short margined petioles ; the upper cauline mostly reduced to lanceolate or subu- 

 late bracts : scales of the involucre linear-lanceolate, barely acute or obtusish, their 

 tips almost always blackish : rays 6 to 12, linear-oblong, conspicuous (rarely want- 

 ing) : akenes angled. Hook. Fl.-i. 332, t. 114. 



Var. exaltatus. Taller or more robust : leaves repandly or some of the upper 

 even laciniately toothed ; the radical slender-petioled. S. exaltatus & S. cordatus, 

 Nutt, 



Low grounds, not rare in the Sierra Nevada, at the altitude of 8,000 to 10,000 feet ; eastward to 

 the Rocky Mountains, northward to Arctic America. Var. exaltatus, at Cisco, Cahto, &c., and 

 in Oregon. Involucre 3 or at most 4 lines high, from cylindraceous to campanulate. Rays 4 or 

 5 lines long. The typical S. lugens is green or early glabrous, rather narrow-leaved, and the 

 upper or even almost all the cauline leaves much reduced in size, so that the stem, which seldom 

 exceeds a foot or two in height, is often naked for most of its length. The var. exaltatus (as 

 understood from Nuttall's character rather than from some specimens named by him) is a coarser 

 form, wholly of the Pacific side, with leaves inclined to be toothed or even laciniate, the radical 

 rather long-petioled : indeed, with the rays and involucre of this species along with the foliage of 

 the next. 



Var. FOLIOSUS, Gray (S. lugens, var. exaltatus, Eaton, in Bot. King Exp.), of the Rocky Moun- 

 tains in Colorado and Utah, but not yet met with in California, is hoary with the white wool up 

 to the flowering state, and the stem conspicuously leafy almost to the top. 



