382 COMPOSITE. Arnica. 



Gray, 1. c. partly ; Gray, Bot. Calif. 1. c. A. mollis, Hook. PI. i. 231 ; Torr. & Gray, PL 1. c; 

 Torr. PI. N. Y. t. 60, a form with comparatively few and mostly broad leaves. A. lanceolata, 

 Nutt. Trans. Am. Phil. Soc. 1. c. A. latifolia, Gray, Bot. Calif, ii. ,458, & i. 415, in part, 

 almost glabrous broad-leaved form. — Unalaska and Sitka to the Sierra Nevada, California, 

 and mountains of Utah and Colorado; east to L. Superior, Mount Washington, and the 

 mountains of Lower Canada. A form with comparatively narrow leaves, N. Maine and 

 Lower Canada, Goodale, Allen, &c. 



A. longif olia, Eaton. Many-stemmed in a tuft, minutely puberulent : cauline leaves elon- 

 gated-lanceolate, tapering to both ends, entire or denticulate, somewhat nervose (3 to 6 inches 

 long), lower with narrowed bases connate-vaginate ; heads corymbosely disposed, short- 

 peduncled : akenes minutely glandular, not hairy. — Bot. King Exp. 186. — On rocks, in the 

 mountains, at 9,000 feet, from above Summit (Jones, Pringle) to Kern Co. (Rothrock) in 

 California, Clover Mountains, Nevada ( Watson), and Wahsatch Mts. (Jones) in Utah. 



A. foliosa, Nutt. Tomentose-pubescent, strict: leaves lanceolate, denticulate, nervose; 

 upper partly clasping by narrowish base, lower with tapering bases connate : heads short 

 peduncled, rarely solitary : akenes hirsute-pubescent or glabrate. — Trans. Am. Phil. Soc. 

 vii. 407 (excl. var. nana) ; Gray, Bot. Calif, i. 416. A. Chamissonis, Torr. & Gray, 1. c, in 

 part. A. montana, Hook. Fl. 1. c, in part. — Wet meadows and mountain-sides, Saskatche- 

 wan to Oregon, N. California, and southward along the Sierra Nevada, and in the Rocky 

 Mountains south to Colorado. 



Var. incana, Gray, Bot. Calif. 1. c. White with Very soft floccose tomentum. — Wet 

 meadows, mostly in water, in the Sierra Nevada, California and adjacent Nevada; first coll. 

 by Brewer and Torrey. 



++ ++ Heads rayless : stems leafy even on the flowering branches. 



A. VlSCOSa, Gray. A foot or less high, fastigiately branching, very viscid-pnbescent : 

 leaves small (inch or less long), ovate-oblong, entire, closely sessile, but not connate at base: 

 involucre 4 lines high, considerably shorter than the (25 or 30) flowers : corollas pale yellow: 

 akenes glandular-hirsute. — Proc. Am. Acad. xiii. 374, & Bot. Calif, ii. 458. — N. California, 

 on Mt. Shasta at 8,000 feet, Gray & Soaker. 



-I— -1— Less leafy : cauline leaves one or two (rarely three) pairs, and the upper mostly small. 

 ++ Heads rayless, mostly 3 to 5 and rather short-peduncled at the naked summit of the stem. 



A. Parryi, Gray. A foot or less high, slender, simple, somewhat hirsutely pubescent and 

 above glandular : leaves membranaceous, commonly denticulate ; radical oval to ovate- 

 oblong (1 to 3 inches long), abruptly or cuneately contracted at base into a short margined 

 petiole ; cauline remote : involucre hirsute and glandular, half-inch or less high : occasion- 

 ally some outermost corollas ampliate : akenes glabrous or with a few sparse hairs. — Am. 

 Nat. viii. 213. A. angustifolia, var. discoidea, latifolia, Gray in Am. Jour. Sci. ser. 2, xxxiii. 

 238. A. angustifolia, var. eradiata, Gray, Proc. Acad. Philad. 1 863, 68. — Rocky Mountains, 

 from Colorado (on the borders of alpine "region) to Wyoming, in the Wahsatch, Utah, and 

 west to Oregon and Washington Terr. ; first coll. by Parry. 



++ ++ Heads conspicuously radiate, solitary or very few, mostly long-peduncled. 

 = Anthers yellow, as in all the preceding species : tube of disk-corollas hirsute. 



A. Nevadensis, Gray-. Half a foot high, puberulent, sometimes cinereous: leaves all 

 oval or oblong, mostly obtuse, entire or a few small denticulations (inch or two long), ob- 

 scurely triplinerved or 3-nerved at base ; radical roundish to obovate, either abruptly con- 

 tracted or tapering into slender petiole : involucre half-inch high : akenes minutely pubescent 

 and glabrate. — Proc. Am. Acad. xix. 55. — Sierra Nevada, California. Lassen's Peak, Mrs. 

 Austin, cinereous form, with rays almost inch long, bears resemblance to Whitneya. Peaks 

 south of Summit, at 9,000 feet, Pringle, greener, roundish-leaved, with rays half-inch long. 



A. alpilia, Olin. A span to 18 inches high, pubescent, hirsute, or at summit villous, strict, 

 simple and monocephalous, occasionally 3-cephalous : leaves thickish, from narrowly oblong 

 to lanceolate, or the radical oblong-spatulate and small uppermost linear, entire or dentic- 

 ulate, 3-nerved ; bases of the cauline hardly at all connate : akenes hirsute-pubescent, rarely 

 glabrate. — "Murr. Syst. Veg., 1774" (according to Fries, but not found there), "Olin, 

 Monogr. Arnic. Upsaliffi, 1799," ex Fries, Summ. Veg. Scand. 187 ; Wahl. PI. Suec. ii. 530; 

 Gray, Bot. Calif, i. 416. A. angustifolia, Vakl, Fl. Dan. t. 1524; DC. Prodr. vi. 317; Torr 



