Arnica fulgens var. sororia
(Greene) G.W.Douglas & G.G.Ruyle-Douglas]
Steven J. Wolf in Flora of North America (vol. 21)
(1 or relatively few) simple or branched.
3-6 pairs, crowded toward stem bases (axils lacking tufts of brown wool); petiolate (petioles, at least basal, narrowly winged); blades (with 3 or 5, prominent, subparallel veins) oblanceolate to narrowly oblong, 3.5-14.5 × 0.6-2.4 cm, margins usually entire, rarely denticulate, apices obtuse, faces uniformly hairy, stipitate-glandular.
13-20, usually narrowly, sometimes broadly, lanceolate.
9-17; corollas yellow-orange.
corollas yellow; anthers yellow.
brown, 3.5-5 mm, densely hirsute, sometimes sparingly glandular as well;
white, bristles barbellate.
= 38. Flowering May-Jul. Prairies and grasslands to montane conifer forests; 500-1500 m; Alta., B.C., Sask.; Calif., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.
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