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4b. Arnica angustifolia Vahl subsp. tomentosa (Macoun) G. W. Douglas & Ruyle-Douglas, Canad. J. Bot. 56: 1710. 1978.
Arnica tomentosa J. M. Macoun, Ottawa Naturalist 13: 166. 1899; A. alpina (Linnaeus) Olin & Ladau subsp. tomentosa (J. M. Macoun) Maguire; A. alpina var. tomentosa (J. M. Macoun) Cronquist
Leaves narrowly lanceolate, faces densely white-woolly-villous. Involucres: densely woolly-villous and densely stipitate-glandular. 2n = 57, 76.
Flowering Jul–Aug. Alpine slopes and subalpine meadows; 500–2500 m; Alta., B.C., Nfld. and Labr. (Nfld.), N.W.T., Yukon; Mont.
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