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Arnica unalaschcensis
Less.
Family:
Asteraceae
Alaska Leopardbane
FNA
Resources
Steven J. Wolf in Flora of North America (vol. 21)
Plants
8-30 cm.
Stems
simple (sparsely to moderately hairy, hairs translucent with purple septa).
Leaves
2-5 pairs, mostly cauline; petiolate (proximal) or sessile; blades elliptic-oblanceolate, obovate or spatulate, (3-)5-12 × 1.5-3 cm, margins usually entire proximal to mid blade, serrate to dentate distally, apices acute to obtuse or abruptly pointed, faces usually glabrate, sometimes scabrous to sparsely stipitate-glandular.
Heads
1 (erect).
Involucres
hemispheric or turbinate-hemispheric (bases moderately villous).
Phyllaries
14-24, lanceolate (apices obtuse, tips blunt, callous).
Ray florets
6-17; corollas yellow (laminae 12-17 mm).
Disc florets:
corollas yellow; anthers dark purple.
Cypselae
brown, 4-5 mm, shortly hispidulous (hairs duplex, apically forked) and stipitate-glandular;
pappi
tawny, bristles subplumose.
2
n
= 38.
Flowering Jun-Aug. Coastal tundra to alpine slopes; 0-1500 m; Alaska; Asia (Japan, Russian Far East).
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This project was made possible in part by the Institute of Museum and Library Services [MG-70-19-0057-19].
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