Arnica griscomiFernald [family ASTERACEAE ] Verified by Not on Sheet, Arnica louiseanaFernald [family ASTERACEAE ] (stored under name); Verified by Not on Sheet,
Related name
Arnica griscomii
Arnica griscomi
Arnica louiseana
Common name
snow arnica, Flora of North America Vol. 21
Lake Louise arnica, Flora of North America Vol. 21
Snow arnica, Flora of North America Vol. 21
Flora
Entry for Arnica griscomii Fernald [family COMPOSITAE]
Plants 5–40 cm. Stems usually simple, rarely branched. Leaves 1–4 pairs, mostly cauline; petio-late; blades elliptic, lanceolate, oblanceolate, ovate, or spatulate, 1.2–10 × 0.5–3.5 cm, margins usually denticulate to dentate, rarely entire, apices acute to obtuse or abruptly pointed, faces usually glabrous or sparingly hispidulous-puberulent, rarely stipitate-glandular. Heads usually 1, sometimes 2–3 (erect or nodding). Involucres hemi-spheric to campanulate-turbinate (bases sparsely to densely pilose, hairs white or yellow). Phyllaries 9–20, lanceolate to oblanceolate, not stipitate-glandular. Ray florets 6–17; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae brown, 2.5–6 mm, abaxially glabrous, adaxially sparsely hirsute or glabrous throughout, rarely glandular; pappi white, bristles barbellate.