Arnica cordifolia

Hooker
Fl. Bor.-Amer. 1: 331. 1834.
Common names: Heartleaf arnica
IllustratedEndemic
Synonyms: Arnica cordifolia var. pumila (Rydberg) Maguire Arnica paniculata Fernald Arnica whitneyi
Treatment appears in FNA Volume 21. Treatment on page 374. Mentioned on page 368.

Plants 10–40(–70) cm. Stems usually simple, sometimes branched. Leaves 2–4(–6) pairs, mostly cauline (basal often persistent on sterile rosettes); petiolate; blades cordate or subcordate to ovate, 3–10 × 2–10 cm, margins dentate to coarsely dentate, apices acute to rounded, faces puberulent to sparsely villous, sometimes stipitate-glandular (especially adaxial). Heads 1, or 3–5(–10). Involucres broadly campanulate. Phyllaries 10–20, narrowly ovate to lanceolate. Ray florets 6–13; corollas yellow. Disc florets: corollas yellow; anthers yellow. Cypselae dark gray, 5–10 mm, sparsely to densely hirsute (hairs duplex), sometimes stipitate-glandular as well; pappi white, bristles barbellate. 2n = 38, 57, 76, 95, 114.


Phenology: Flowering May–Jul.
Habitat: Conifer forests to subalpine meadows
Elevation: 500–3000 m

Distribution

V21-938-distribution-map.gif

Alta., B.C., Man., N.W.T., Ont., Sask., Yukon, Ariz., Calif., Colo., Idaho, Mich., Mont., Nev., N.Mex., Oreg., S.Dak., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

... more about "Arnica cordifolia"
Steven J. Wolf +
Hooker +
Heartleaf arnica +
Alta. +, B.C. +, Man. +, N.W.T. +, Ont. +, Sask. +, Yukon +, Ariz. +, Calif. +, Colo. +, Idaho +, Mich. +, Mont. +, Nev. +, N.Mex. +, Oreg. +, S.Dak. +, Utah +, Wash. +  and Wyo. +
500–3000 m +
Conifer forests to subalpine meadows +
Flowering May–Jul. +
Fl. Bor.-Amer. +
Illustrated +  and Endemic +
Arnica cordifolia var. pumila +, Arnica paniculata +  and Arnica whitneyi +
Arnica cordifolia +
species +