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broad-leaf arnica, daffodil leopardbane, mountain arnica

Habit Plants 10–50 cm.
Stems

usually simple, sometimes branched distally.

Leaves

2–4(–6) pairs, cauline (basal leaves often persistent on sterile rosettes), petiolate (proximal, petioles relatively short, broadly winged) or sessile (mid and distal);

blades lance-elliptic to ovate, 2–10 × 1–6 cm, margins serrate to dentate, apices obtuse to acute, faces glabrous or sparsely villous.

Involucres

narrowly turbinate.

Ray florets

8–15;

corollas yellow.

Disc florets

20–90;

corollas yellow;

anthers yellow.

Phyllaries

8–20, lanceolate to oblanceolate.

Heads

1 or 3–5(–9).

Cypselae

dark brown, 5–9 mm, sparsely villous;

pappi white, bristles barbellate.

2n

= 38, 76.

Arnica latifolia

Asteraceae tribe heliantheae subtribe chaenactidinae

Phenology Flowering Jul–Aug.
Habitat Relatively moist, montane conifer forests to subalpine meadows
Elevation 500–3300 m (1600–10800 ft)
Distribution
from FNA
AK; CA; CO; ID; MT; OR; UT; WA; WY; AB; BC; NT; YT
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 376.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica
Sibling taxa
A. acaulis, A. angustifolia, A. cernua, A. chamissonis, A. cordifolia, A. dealbata, A. discoidea, A. fulgens, A. gracilis, A. griscomii, A. lanceolata, A. lessingii, A. lonchophylla, A. longifolia, A. louiseana, A. mollis, A. nevadensis, A. ovata, A. parryi, A. rydbergii, A. sororia, A. spathulata, A. unalaschcensis, A. venosa, A. viscosa
Name authority Bongard: Mém. Acad. Imp. Sci. St.-Pétersbourg, Sér. 6, Sci. Math. 2: 147. (1832)
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