ARNICA GRACILIS.
Stem slender, 1-2 dm. high ; whole plant glabrous, except a little glandular puberulence on the pedicels and involucre; basal leaves broadly ovate, petioled, dentate, 3-ribbed; stem leaves about 2 pairs, similar, the upper sessile; heads 1-3; disk 10-15 mm. high ; bracts 12-15, oblong-lanceolate, acuminate; rays about 15 mm. long ; achene almost glabrous.
It much resembles the preceding and may perhaps be a form of it, but differs by the smaller heads, the glandular-puberulent involucre and pedicels and the glabrous foliage and stem. It ap proaches depauperate forms of A. latifolia.
Type: J. H. Flodman, no. 901, 1896, from the Spanish Peaks.