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|Jepson eFlora: Taxon page
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Arnica||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Arnica cordifolia Hook.
Habit: Plant 1--4 dm from +- scaly-tipped rhizome, unevenly glandular and short-hairy. Stem: 1--few, loose, generally unbranched. Leaf: basal often persistent on sterile rosettes; cauline 2--4 pairs, petioled, reduced distally on stem, blades 3--11 cm, +- strongly cordate (except stunted alpine plants), generally shallowly toothed. Inflorescence: heads radiate, 1--5; involucre 15--20(30) mm, obconic to bell-shaped; phyllaries narrowly ovate to lanceolate, +- long-white-hairy, glandular or not. Ray Flower: 6--13; ray < 30 mm. Disk Flower: corolla soft-hairy, glandular. Fruit: 5--10 mm, short-forked-hairy or glandular; pappus short-barbed, +- white. Chromosomes: 2n=38,57,76,95,114.
Ecology: High meadows, conifer forest; Elevation: 500--3000 m. Bioregional Distribution: KR, NCoR, CaRH, SNH, e SnFrB, SCoRO, PR, MP; Distribution Outside California: to Wyoming, north-central North America, New Mexico. Flowering Time: May--Jul Note: Generally asexual. Stunted alpine plants with ovate leaves, glandular fruit sometimes treated as Arnica cordifolia var. pumila (Rydb.) Maguire.
eFlora Treatment Author: Steven J. Wolf & Theodore M. Barkley
Jepson Online Interchange
Previous taxon: Arnica chamissonis
Next taxon: Arnica dealbata
Citation for this treatment: Steven J. Wolf & Theodore M. Barkley 2017. Arnica cordifolia, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=1118, accessed on January 18, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on January 18, 2017.