Flora of North America species comparison

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Arnica ovata

diverse arnica, leaf arnica, sticky arnica, sticky-leaf arnica
Habit Plants 10–50 cm.
Stems

(forming clumps) simple or branched among heads.
Leaves

2–3(–4) pairs (basal 1–2 pairs usually withered by flowering, petiolate, petioles broadly winged, blades round-ovate, relatively small; sterile rosettes lacking), mostly cauline; petiolate (at least middle pair, petioles broadly to narrowly winged);

blades broadly deltate to ovate, 4–8 × 2–6 cm (middle pair largest), margins irregularly denticulate to coarsely dentate-serrate, apices acute, faces puberulent (hairs minute) and stipitate-glandular.
Involucres

usually narrowly turbinate, rarely narrowly campanulate.
Ray florets

8–16, yellow.
Disc florets

corollas yellow;

anthers yellow.
Phyllaries

9–20, linear to narrowly lanceolate.
Heads

1–3(–5).
Cypselae

brown to black, 5–7 mm, sparsely to moderately pilose and stipitate-glandular;

pappi stramineous to tawny, bristles subplumose.
2n

= 57, 76.

Arnica ovata
Phenology Flowering Jul–Sep.
Habitat Moist meadows and conifer forests, stream banks, late snow-melt areas, montane to subalpine
Elevation 200–3600 m (700–11800 ft)
Distribution
from FNA
AK; CA; CO; ID; MT; OR; UT; WA; WY; AB; BC; YT
[WildflowerSearch map]
[BONAP county map]
Source FNA vol. 21, p. 372.
Parent taxa Asteraceae > tribe Heliantheae > subtribe Chaenactidinae > Arnica
Sibling taxa
A. acaulis, A. angustifolia, A. cernua, A. chamissonis, A. cordifolia, 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. parryi, A. rydbergii, A. sororia, A. spathulata, A. unalaschcensis, A. venosa, A. viscosa
Synonyms A. diversifolia, A. latifolia var. viscidula
Name authority Greene: Pittonia 4: 161. (1900)
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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