422 COMPOSITAE 
6. Arnica parryi A. Gray. Nodding Arnica. Fig. 5724. 
Arnt tifoli ge eradiata A. Gray, Proc. —~ Paso 1: 68. 1863. 
Arnica parryi A. Gra nC. C. Parry: rene sp: 1874. 
picove att Heller, Cn N. Amer. Pl. 7. ae 
Perennial ak freely rooting to ay naked rhizomes; stems mostly solitary, 2-6 dm. tall, 
often somewhat woolly-villous toward the base, becoming glandu lar at least above. Cauline ek 
mostly 2-4 pa eachake reduc art upward, the low ermost petiolate, with lanceolate or lance-ovate 
blade 5-20 cm. long and 1.5-6 cm. wide; well-dev coped basal leaves similar to the lower cauline 
ones often pro acti 3 on separate Hort shoots ne: nerally several, nodding in bud, later more 
or less erect, campanulate, sometimes narro 0, 5 Oftinatily discoid, the marginal corollas some- 
times ampliate or nee ee badites hivalecre mostly 10-14 m m. hi gh, its rather narrow bracts 
sharply acute or acu achenes glabrous to sanontar or wie pappus tawny, strongly bar- 
bellate to weakly subohia 
w , drier me and moist slopes, in the foothills and at moderate elevations in the mountains, 
y Canadia ng Pee otk ertt Ribera ings Py Lee: Columbia to scone sg eho Wane southern Oregon, rarely 
poss ie hes into northern tie comm the Cascade and Olymp c¢ Mounta of Wa shi iaaien but seldom 
collected i in Orego: ocality: Clear acc Colorado. July—Aug 
Arn var. sOnnei ireeee) Cronquist in Ferris, Poe, Dudley Herb. 5: 102. 1958. (A. sonnet 
Greene, Pittonia 3: 104. 1896; vee | rete var. esa Je ete — n. Fl. Pl. Calif. 1157. 1925; A. parryt subsp. 
sonnei Maguire, boat 4: 482. 3.) Lower part of the and lower petioles more consistently and more 
densely and conspicuously woolly-v file ous han an the typical subspecies; beats cndinasehy pr: cana the rays Os 
mostly 7-15 mm. ee. Sierra Niveas of ee et and aia t Nevada, exte ng © rthward, rarely, the 
Cascade Mountains of southern Oregon. e locality: near Tru ckee Rives ents 
7. Arnica fulgens Pursh. Hillside Arnica. Fig. 5725. 
Arnica fulgens Pursh, Fl. Amer. Sept. _ haere 
Arn sca montane ET mrese Nutt. Gen. 2: 
rn Rydb Bull. Torrey Nes ‘a: ee 1897, 
Per ennial from short, freely rooting, densely scaly rhizomes, the basal leaves and persistent 
old leaf. bases with oo axillary tufts of long brown wool ; stem stout, 2-6 dm. tall, stipitate- 
glandular and alten also hairy, more densely so upward. Leaves 3-5-nerved entire “ nearly sO, 
a to) u ro 
ie 1m. 
isk-corollas with some spreading white hairs as well as aaecly: Siendaiad “achenes 
densely hairy; pappus whitish or stramineous, barbs llate. 
shia chiefly in the foothills and at moderate elevations in the mountains, Arid qipeaision and Cana- 
dian Zonas: analog fy British Columbia to Ceci tchewan south to Co lorade, northern Nevada, northeastern 
California. Type locality: ‘‘On the banks of the Missouri.’”? May—Jul 
8. Arnica sordéria Greene. Twin Arnica. Fig. 5726. 
Arnica sororia Greene, Ottawa Nat. 23: 213. 1910, 
Similar to te a Jwinens _ averaging more ses a ane less scaly, more slender, and 
en more elo Leaves averaging narrower and ‘few ool nearly or fi absent from 
the axils of a Toeat oe white when prese nea Sinvolucra pay narrower ess hairy, gen- 
erally broadest at or near the base, tapering then Bo more acute tip; isk: corollas stipitate- 
glandular, not otherwise hates pappus white or ee 
Open, often rather dry places in the foothills and at ee elevations in the mountains, Arid Transition 
Zone; southern ng peg nag and Alberta to Wyoming, northern Utah, and northeast epoca t annes 
nearly to Donner Pas e Sierra Nevada). Type locality: between the Kettle and Columbia Rivers, Cascade 
British Columbia. tay «5 Bug 
9. Arnica rydbérgii Greene. Subalpine Arnica. Fig. 5727. 
Arnica rydbergii Greene, Pittonia 4; 36. 1899. 
Arnica aurantiaca Greene, Torreya 1: 42. 1901. 
Arnica sulcata Rydb, N. ‘aie . Fl. 34: 344. 1927. 
late or spatulate, 3-5-nerv: 7 1 a de frequently pie d on 
e short shoots; cauline leaves mostl pairs, sessile, or the lower shortly and broadly 
wing-petiolate, oblanceolate or spatulate to la late o metimes a little broader, entire or 
nearly so, 3-5-nerved, mostly aggregated on the lower part of the stem, 3-10 cm. long a 
wide, or the r smaller and distant; heads ry inate-campanulate ; involucre 
t 
ciliate or scaberulous on the margins, moderately acute; rays mostly about 8, 1-2 cm. long, t 
ip minutely toothed or entire; achenes densely ot ice sed eaten the upper hairs the 
es Ae barbellate. 
open slopes, mostly at high elevations in the mountains, Hudsonian Zone; British Co- 
lumbia and Thee ‘e Ps vides northern Utah, eastern — and (rarely) northern California (Scott Moun- 
tains). c= locality: Little Belt Pass, Montana. July—A 
