450 COMPOSITE. Arnica. 



pie) oblong-lanceolate, acute, sparingly denticulate or entire, tripli-quintupli- 

 nerved, pubescent or somewhat villous; the cauline 4-7 pairs, nearly equal, 

 partly clasping ; the lowest tapering to the base ; rays short ; achenia mi- 

 nutely hirsute. — Less.! in LintKea, 6. p. 238 ; DC. ! I. c. A. montana a., 

 Hook.! I. c. A. foliosa, Nutt.! in trans. Amer. phil. soc. (n. ser.) 7. p. 407. 

 Unalaschka, Chamisso ! Rocky Mountains on the Colorado of the West, 

 Nuttall! to the Woody Country of Subarctic America, Richardson ! S^c.^ 

 Stem 1-2^ feet high. Leaves 3-5 inches long. Heads on slender pedun- 

 cles. Pappus plumose-serrate. Achenia (in our original as well as other 

 specimens) less hirsute than in A. montana. 



4. A. mollis (Hook.) : villous-pubescent ; stem leafy, bearing 1—5 heads; 

 leaves thin and flaccid, veiny, nearly glabrous when old, denticulate or toothed ; 

 the cauline 3-5 pairs, somewhat equal ; the upper ovate-lanceolate and closely 

 sessile ; the lower lanceolate or oblong, narrowed at the base, or tapering into 

 a margined petiole ; scales of the hirsute involucre acuminate ; achenia 

 hirsute ; pappus almost plumose. — Hook. ! Jl. Bor.-Am. 1. p. 331. A. lan- 

 ceolata, Nutt. ! in trans. Amer. phil. soc. I. c. p. 408. 



Alpine rivulets of the (northern) Rocky Mountains, Drummond ! Moist 

 places on the White Mountains of New Hampshire, in the alpine and sub- 

 alpine region. Dr. Pickering! Mr. Oakes ! Nuttall! Mr. Tuckerman! 

 Mountains of New York, near the sources of the Hudson River! — Stem 

 10-30 inches high; the internodes mostly longer than the leaves. Upper 

 leaves obscurely 3-nerved from the broad base ; the lower somewhat tripli- 

 nerved ; the radical oblong-spatulate, petioled ; the upper varying from ob- 

 long-ovate and obtuse to lanceolate from a broad base, and tapering to an 

 acute point. Heads smaller than in A. montana ; the pappus nearly plu- 

 mose to the naked eye. 



5. A. laiifolia (Bongard) : stem sparingly hirsute-pubescent, or nearly gla- 

 brous, bearing 3-5 heads ; leaves thin and flaccid, ovate, unequally and often 

 very sharply serrate, veiny, minutely pubescent with short hairs above, gla- 

 brous (except the veins) beneath ; the cauline about 3 pairs, often acute, 

 sessile, or the lowermost somewhat petioled ; the radical subcordate, obtuse, 

 on slender petioles ; scales of the involucre lanceolate, acuminate, hairy 

 towards the base ; achenia almost glabrous. — Bong. ! veg. Sitcha, I. c. p. 

 147; DC! I.e. A. Menziesii, Hook.! fl. Bor.-Am. 1. p. 331, t. Ill ; 

 Nutt. I. c. 



North West Coast, from Sitcha! Observatory Inlet! and Fort Vancouver ! 

 to the Rocky Mountains ! — Stems 1-2 feet high. Peduncles slender. Scales 

 of the campanulate involucre and the rays usually 11 to 14, in the Sitcha 

 specimens as well as others ; in which also the achenia are not perfectly gla- 

 brous, but pubescent with scattered hairs near the summit. 



6. A. cordifolia (Hook.) : stem sparingly villous, bearing 1-5 heads; leaves 

 nearly all cordate, thin, nearly glabrous, veiny, very unequally and often in- 

 cisely and sharply serrate ; the cauline 2-3 pairs, mostly acute ; the upper- 

 most sessile, the others like the radical on slender petioles ; scales of the in- 

 volucre acuminate, villous when young; achenia hirsute-pubescent. — Hook.! 

 Jl. Bor.-Am. I. c. A. macrophylla, Nutt. in trans. Amer. phil. soc. I. c. 



Vallies of the Blue Mountains of Oregon, Douglas ! Nuttall, to the Spo- 

 kan River, and the east side of the Rocky Mountains, Drummond ! — Plant 

 10-20 inches high, often paniculate at the summit, bearing larger heads than 

 the preceding (from which it is perhaps not sufficiently distinct), with about 

 12 large and long rays. Lower leaves often obtuse, and shorter than the 

 hairy petioles. Achenia becoming glabrous towards the base. 



7. A. amplexicaulis (Nutt.) : sparingly pubescent, or at length glabrous, 

 somewhat caespitose, very leafy ; cauline leaves 5-6 pairs, approximate, 



