Senedo. COMPOSITE. 389 



uniflosculosus, Gray, Pacif. R. Rep. iv. 1 1 1. Low grounds, common in California ; first coll. 

 by Douglas. Connects with S. lugcns, var. e.raltatus. 



b. Stems low and simple, bearing a solitary or few comparatively large heads: involucre not at all 

 calyculate: leaves entire or merely dentate ; radical and lower ones spatulate to obovate. Arctic- 

 alpine species, loosely cottony-woolly, tardily glabrate. 



S. Hookeri, TORE. & GRAY. Perhaps a less arctic variety of the next, bearing 3 to 5 

 closely corymbose heads, or a var. of S. campestris of the Old World, but ovaries and akeues 

 glabrous. Fl. ii. 438. S. integrifolius, Hook. Fl. i. 334, excl. syu. S. campestris, Hook. f. 

 Arct. PI. 395, partly. Cineraria integrifolia, Richards. 1. c. Arctic and Subarctic America 

 and high-northern Rocky Mountains, Richardson, &c. 



S. frigidus, LESS. A span or two high, 3-5-leaved, bearing a solitary head, sometimes 

 2 or 3 : leaves spatulate, or the radical rounded-obovate and cauline lanceolate from a broad 

 or narrow sessile base, these sometimes dentate : involucre half-inch high, usually villous 

 with some purplish hairs, especially at the thickened base or summit of the peduncle: rays 

 rather numerous, becoming half-inch long: ovaries and akenes glabrous or sparsely hairy. 

 -Less, in Linn. vi. 239 ; Hook. Fl. i. 334, t. 1 12 ; Torr. & Gray, Fl. ii. 445. Cineraria friyiila, 

 Richards. 1. c.; Hook. & Am. Bot. Beech. 126; Herder, 1. c. 124. (' . atropurpurea, Ledeb. 

 ex DC., &c. Newfoundland i and Labrador, Arctic coast to Kot/.ebue Sound, &c. (N. E. 

 Asia.) 



c. Stems low, only 2 to 6 inches high, scapiform: leaves clustered on the rootstock or caiulex, 

 entire or eremite; those of the scape few and very small, reduced to mere bracts: involucre 

 slightly calyculate. Rocky Mountain species, chiefly alpine or subalpine. 



1. Leaves linear, not thick: akenes papillose-hirtellous. 



S. Thurberi, GUAT. Leaves densely tufted on the branches of the multicipital cauclex, 

 about inch long, barely a line wide toward the apex, tapering into a slender base, entire or 

 nearly so, tomentose-cauesceut, tardily glabrate : scapes glabrate, 4 to 6 inches high, bearing 

 2 to 5 heads ; these 4 or 5 lines high : rays 7 to 10, 3 lines long. Proc. Acad. Philad. 1863, 

 68. S. canus, var. pyymcBtts, Gray, Bot. Mex. Bound. 103. Mountain-sides, Santa Rita del 

 Cobre, New Mexico, TJturber, B'gelow. 



2. Leaves thick and coriaceous, tapering into a petiole, crowded on the multicipital caudex, nearly 

 veiuless, even the midrib obscure: akenes glabrous. 



S. Werneriaefolius, GEAY. Woolly and cauesceut, tardily glabrate : leaves quite entire, 

 erect or ascending, from spatulate-liuear (2 or 3 inches long, including the petiole-like base, 

 by 2 or 3 lines wide) to elongated-oblong (inch long and half-inch wide) and short-petioled, 

 the margins sometimes rcvolute : scape a span high, rather stout, bearing 2 to 8 heads ; these 

 4 or 5 lines high: rays 10 or 12, oblong, 2 lines long, rarely few or wanting. Proc. Am. 

 Acad. xix. 54. S. aureits, var. ivernericvfolius, Gray, Proc. Acad. Philad. 1863, 68; Porter & 

 Coulter, Fl. Colorad. 81. Mountains of Colorado, alpine, in coniferous woods near the 

 upper limit of trees, and in the alpine region, mostly on the upper waters of Clear Creek, 

 Hull & Harbour, Greene, Coulter, &c. 



S. petreeus, KLATT. Glabrous or early glabrate : leaves from orbicular-obovate or oval 

 (a quarter to half an inch long) to cuueate-obloug (largest inch long), entire or 3-7-crenate- 

 toothed at the broad summit, abruptly petioled : scapes 1 to 3 inches high, bearing solitary 

 or several clustered heads ; these 4 or 5 lines high : rays 6 to 10, golden yellow, 3 lines long. 

 Abhand. Nat. Gesellsch. Halle, xv. (1881). S. aureus, var. alpinus, Gray, Am. Jour. Sci. 

 11. ser. xxxiii. 11 ; Porter & Coulter, 1. c. S. aureus, var. borealis, mainly, Gray, Bot. Calif, i. 

 412. Alpine region of the Rocky Mountains in Colorado (first coll. by Parry), of Utah 

 ( Ward), and highest peaks of the Sierra Nevada, California, Brewer, &c. Approaches the 

 preceding on one hand, and S. aureus, var. borealis, on the other. 



3. Leaves round-cordate, crenate, purple-tinged beneath, slender-petioled, more or less clustered at 

 the base of the scape: akenes glabrous: plants very glabrous. 



S. renif olius, PORTER. Two inches high from filiform creeping rootstocks : leaves thickish, 

 resembling those of Ranunculus Cymbalaria, rouuded-subcordate or reniform, only about 

 half-inch wide, coarsely 5-7-crenate : scape or peduncle little surpassing the leaves, bearing 

 a solitary comparatively large (half-inch long) head: rays about 8, oblong, 4 lines long. 

 Porter & Coulter, Fl. Colorad. 83. High alpine region on Whitehouse Mountain, in Cen- 

 tral Colorado, at 13,000 feet, J. M. Coulter. 



