534 COMPOSITAE. Vor. IIL. 
3. Arnica mollis Hook. Hairy Arnica. 
Fig. 4601. 
Arnica mollis Hook. Fl. Bor. Am. 1: 331. 1833. 
Villous-pubescent; stem simple, or little 
branched, 1°-23° high, bearing 1-6 heads at 
the summit. Leaves oblong or oblong-lanceo- 
late, dentate or entire, acute or obtuse, 2’-5’ 
long, 3-9” wide, the lower and basal ones 
narrowed into petioles, the upper sessile, and 
usually somewhat connate by a broad or nar- 
rowed base, those of the stem 3-5 pairs, usu- 
ally with some alternate small ones on the 
branches; heads 1’-2’ broad; bracts of the in- 
volucre acute; rays 10-15, 3-toothed; achenes 
hirsute-pubescent; pappus yellow-brown, plu- 
mose. 
Mountains of northern New York, New Hamp- 
shire and Maine to New Brunswick, west to Lake 
Superior, British Columbia and California, south 
in the Rocky Mountains to Utah and Colorado. 
Included, in our first edition, in the northwestern 
A, Chamissonis Less. June-Aug. 
bk i> ny 
4. Arnica chionopappa Fernald. White-plumed 
Arnica. Fig. 4602. 
Arnica chionopappa Fernald, Rhodora 7: 148. 1905. 
Stem 15’ high or less, villous to the base. Leaves thin in 
texture, the lower and basal ones ovate to lanceolate, acute, 
narrowed at the base, sharply dentate with few teeth, peti- 
oled, 23’-4%’ long, the upper few pairs narrowly lanceolate, 
entire, sessile; heads solitary or few, about 13’ broad; invo- 
lucre villous, 4’-5” high, its bracts linear-lanceolate, acumi- 
nate; rays 10-15; pappus bright white, barbellate. 
On wet cliffs, Quebec and New Brunswick. June-July. 
Arnica gaspensis Fernald, from ledges in Gaspé County, Que- 
bec, has creamy-white pappus, the involucre and peduncles 
glandular-pubescent. 
Mountain Tobacco. Arctic Leopard’s- 
bane. Arctic Arnica. Fig. 4603. 
Arnica montana var. alpina L. Sp. Pl. 884. 1753. 
Arnica alpina Olin & Laden, Diss. 11. 1799. 
A A, angustifolia Vahl, Fl. Dan. pl. 1524. 1814. 
A, plantaginea Pursh, Fl. Am. Sept. 527. 1814. 
A, Sornborgeri Fernald, Rhodora 7: 147. 1905. 
Stem slender, 6-15’ high, villous or pubes- 
cent, and glandular or glabrous below; stem 
simple, usually bearing but a single head, but 
sometimes with 1-3 additional ones from the 
axils of the upper leaves. Leaves lanceolate, 
linear-oblong, or the lowest spatulate, thickish, 
entire or denticulate, 3-nerved, the basal ones 
petioled, those of the stem 1-4 pairs, sessile 
or short-petioled, scarcely connate, the upper 
pair usually much smaller than the lower ones; 
heads about 2’ broad; rays 10-15, 3-toothed; 
achenes hirsute; pappus brownish. 
Labrador to Greenland and the Arctic Sea, 
Also in northern Europe. Races differ in pubes- 
cence. Rocky Mountain plants formerly referred 
to this species appear to be distinct. May-Sept. 
