Flora of North America species comparison

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Arnica cordifolia

heart-leaf arnica, heart-leaf leopardbane
Habit 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).
Involucres

broadly campanulate.
Ray florets

6–13;

corollas yellow.
Disc florets

corollas yellow;

anthers yellow.
Phyllaries

10–20, narrowly ovate to lanceolate.
Heads

1, or 3–5(–10).
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.

Arnica cordifolia
Phenology Flowering May–Jul.
Habitat Conifer forests to subalpine meadows
Elevation 500–3000 m (1600–9800 ft)
Distribution
from FNA
AZ; CA; CO; ID; MI; MT; NM; NV; OR; SD; UT; WA; WY; AB; BC; MB; NT; ON; SK; YT
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 374.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica
Sibling taxa
A. acaulis, A. angustifolia, A. cernua, A. chamissonis, A. dealbata, A. discoidea, A. fulgens, A. gracilis, A. griscomii, A. lanceolata, A. latifolia, 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
Synonyms A. cordifolia var. pumila, A. paniculata, A. whitneyi
Name authority Hooker: Fl. Bor.-Amer. 1: 331. (1834)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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(If the plant you're looking for doesn't show up in the auto-complete list, that means it either isn't described in Flora of North America yet, or it's listed under a synonym. And please note that Flora of North America is still missing several plant families, including Fabaceae, Apiaceae, Boraginaceae, and Polemoniaceae.)

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