Arnica lessingii

Plants 8–35 cm. Stems (1–3 together) usually simple, rarely branched (moderately to densely hairy, hairs translucent with purple septa). Leaves (2–) 3–5 (–6) pairs, usually crowded toward stem-bases; petiolate or sessile (petioles short-winged); blades elliptic, lanceolate, or broadly oblanceolate, 3–10 × 1–2.5 cm, margins usually entire proximal to mid-blade, subentire to denticulate distally, apices acute to obtuse, faces: abaxial paler and often glabrous, adaxial slightly hairy. Heads 1 (nodding). Involucres turbinate-campanulate (bases moderately villous, hairs brownish). Phyllaries 11–15, lanceolate to elliptic (apices obtuse, tips blunt, callous). Ray-florets 8–13; corollas yellow (laminae 14–20 mm). Disc-florets: corollas yellow; anthers dark purple. Cypselae brown, 5–6 mm, sparsely strigose (hairs simple, apically pointed) or glabrous; pappi tawny, bristles barbellate. 2n = 38, 57, 76.

Phenology: Flowering Jun–Sep.
Habitat: Coastal tundra to alpine slopes
Elevation: 0–1500 m

B.C., N.W.T., Yukon, Alaska, Asia (Russian Far East)

Discussion

Selected References

None.

Lower Taxa