470 COMPOSITE. 



only a few inches bigh, naked, bearing a corymb of small radiate beads 

 at summit. — Alpine on Mt. Conuess, Harford; otberwise known only 

 from the Colorado Rocky Mountains. 



2G. S. i>etropliilns, Greene, Pittonia, iii. 171 (1897). S. petrxus, 

 Klatt (1881), not of Boissier & Reuter (1842). Low, the caudex multi- 

 cipital and its branches leafy; herbage rather succulent and glabrous, 

 or early glabrate: leaves round-obovate or oval, }^ — % in. long, or 

 cuneate-oblong and larger, entire or crenately few-toothed at the broad 

 summit, abruptly petioled: scape 2—5 in. high, bearing 1 or more large 

 heads (4 — 5 lines high): rays 6 — 10, golden-yellow, 3 lines long. — Alpine 

 on the highest summits of the Sierra. 



== = Leaves mostly pinnate, and lyrately so, or the pinnx reduced or obso- 

 lete, the one terminal leaflet then constituting the leaf. 



27. S. l^tiflorns, Greene, Pittonia, iii. 88 (1896). Stems tufted, 

 erect, 10 — 18 in. high, rather loosely cymose-corymbose at summit: leaves 

 mostly radical, somewhat fleshy, light green, glabrous except a very 

 distinct arachnoid white tomentum on the margins of the dilated bases 

 of the long slender petioles, the blade from spatulate-obovate and oval 

 to round ovate, mostly creuate or serrate-toothed, rarely entire; cauline 

 leaves few, sessile and pinnatifid, often lyrately so: involucres campan- 

 ulate, 4 or 5 lines high and nearly as broad; bracts lanceolate, acumi- 

 nate, fleshy and carinate ; rays showy, pale-yellow : chestnut-brown 

 achenes 5-angled and with 5 alternating ribs. — Truckee Valley and 

 northward, in meadows along streams. 



28. S. Lemberti, Greene, 1. c. 89. Stems clustered, very leafy at 

 base and sparsely so above, erect, 1 — 2 ft. high; herbage glabroiis 

 throughout and the leaves thin; the radical from round-ovate and 

 crenate to spatulate-obovate and coarsely dentate, 4 to 8 inches long 

 including the slender petiole; cauline reduced in number and in size, 

 deeply and somewhat lyrately pinnatifid, with a broad and clasping 

 base: heads 6—8, in a terminal rather condensed umbel; involucre 4 

 lines high, broadly cyliodrical, bracts about 20, lanceolate, thin, purple- 

 tipped: flowers saflPron-color; rays none. — Subalpine above the Yosemite, 

 Lembert, and on Mt. Conness, Harford. 



29. S. iiideeorus. Stems erect, stoutish, 2 ft. high, sparsely leafy 

 throughout; herbage flaccid, with traces of arachnoid wooUiness, but 

 glabrate in age: lowest leaves not numerous, oval, obtuse, truncate at 

 base, from crenately to deeply and incisely serrate, % — 1% in. long, on 

 slender petioles of 2—3 inches, the lower and middle cauline on short 



