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"
114 +, 95 +, 76 +, 57 +  and 38 +
not tailed +, rounded +  and obtuse +
connate +  and distinct +
subequal +
scarious +
usually ovate +  and lanceolate +
usually deltate +  and lanceolate +
corymbiform +  and cymiform +
indeterminate +  and determinate +
Steven J. Wolf +
Hooker +
decurrent +
compound +  and simple +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
subcordate;ovate +
2cm;10cm +
winged;ribbed;winged;ribbed +
tuberculate +  and rugose +
connate +  and distinct +
Heartleaf arnica +
stipitate-glandular +  and hairy +
stipitate-glandular +  and hirsute +
obovoid-cylindric +, fusiform +  and conic +
fertile +  and bisexual +
fertile +  and bisexual +
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 +
stipitate-glandular +, puberulent +  and sparsely villous +
scabrellous +
pistillate +, staminate +  and neuter +
winged +  and beaked +
dispersed +
campanulate +  and cylindric +
Conifer forests to subalpine meadows +
discoid +  and radiate +
in cymiform or corymbiform arrays +  and singly +
indeterminate +
homogamous +  and heterogamous +
each +  and sessile +
0.6 cm6 mm <br />0.006 m <br /> (2 cm20 mm <br />0.02 m <br />) +
campanulate +
2 (?) +  and 4 (?) +
deltate +
toothed +  and entire +
dentate to coarsely +
2-carpellate +
subplumose +  and barbellate +
persistent +
10 +  and 50 +
aristate +
Flowering May–Jul. +
10 +  and 20 +
Fl. Bor.-Amer. +
bearing subulate enations +, hairy +  and bristly +
pitted +  and smooth +
distinct +
4 +  and 20 +
exalbuminous +
Illustrated +  and Endemic +
branched +  and simple +
appendaged +  and truncate +
hirsutulous +  and glabrous +
papillate +
Arnica cordifolia var. pumila +, Arnica paniculata +  and Arnica whitneyi +
Arnica cordifolia +
species +
campanulate +  and cylindric +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
1 cm10 mm <br />0.01 m <br /> (80 cm800 mm <br />0.8 m <br />) +
toothed +  and entire +
80 cm800 mm <br />0.8 m <br /> (300 cm3,000 mm <br />3 m <br />) +
5 cm50 mm <br />0.05 m <br /> (100 cm1,000 mm <br />1 m <br />) +