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|Jepson eFlora: Taxon page
Key to families | Table of families and genera
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|Family: Asteraceae (Compositae)||View Description||Dichotomous Key|
|Genus: Arnica||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Arnica chamissonis Less.
Habit: Plant 2--8 dm, +- hairy, generally glandular distally. Stem: 1, branched distally. Leaf: cauline 4--10 pairs, sessile or short-petioled, 5--20(30) cm, blade (ob)lanceolate, +- entire, distal +- reduced. Inflorescence: heads radiate, 3--10; involucre 8--15 mm, bell-shaped; phyllaries nearly linear to narrowly lanceolate, +- obtuse, adaxial face generally hair-tufted near tip. Ray Flower: 8--20; ray 10--20 mm. Disk Flower: corolla +- densely soft-hairy, stalked-glandular, tube generally 3--4.5 mm. Fruit: 3--8 mm, +- glabrous to short-hairy, glandular; pappus short-barbed or weakly +- plumose, dirty white to straw-colored. Chromosomes: 2n=38,57,76.
Ecology: Damp meadows, rocky places, conifer forest; Elevation: 1800--3500 m. Bioregional Distribution: KR, CaR, SN, SnBr, Wrn, n SNE, W&I; Distribution Outside California: to British Columbia, Montana, New Mexico. Flowering Time: Jul--Aug Note: Generally asexual.
Synonyms: Arnica bernardina Greene; Arnica chamissonis subsp. foliosa (Nutt.) Maguire; Arnica chamissonis var. bernardina (Greene) Jeps. ex Maguire
eFlora Treatment Author: Steven J. Wolf & Theodore M. Barkley
Jepson Online Interchange
Previous taxon: Arnica cernua
Next taxon: Arnica cordifolia
Citation for this treatment: Steven J. Wolf & Theodore M. Barkley 2017. Arnica chamissonis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=1115, accessed on February 21, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 21, 2017.