Burke: Arnica dealbata vs. Arnica chamissonis

	Arnica dealbata	Arnica chamissonis
		leafy arnica, meadow arnica, narrowleaf arnica, silvery arnica, leafy leapordbane
Habit		Perennial from long, naked rhizomes; stems solitary, 2-10 dm. tall; herbage variously pubescent, becoming glandular above.
Leaves		Leaves opposite, sessile, 5-10 pairs, only slightly reduced upward; leaves lanceolate to oblanceolate, entire or slightly toothed, 5-30 cm. long and 1-4 cm. wide.
Flowers		Heads several, the involucre 8-12 mm. high, the herbaceous bracts sub-equal, usually obtuse, with a tuft of long, white hairs; ray flowers pale yellow, usually 13, pistillate, 1.5-2 cm. long; disk flowers yellow, perfect; pappus somewhat tawny, barbellate.
Fruits		Achene with short hairs, somewhat glandular.

	Arnica dealbata	Arnica chamissonis
Flowering time		June-September
Habitat		Meadows and wet places from middle elevations to the subalpine.
Distribution	[WildflowerSearch map] [BONAP county map]	Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin		Native
Conservation status		Not of concern
Sibling taxa	A. chamissonis, A. cordifolia, A. discoidea, A. fulgens, A. gracilis, A. lanceolata, A. latifolia, A. longifolia, A. mollis, A. nevadensis, A. ovata, A. parryi, A. rydbergii, A. sororia	A. cordifolia, A. discoidea, A. fulgens, A. gracilis, A. lanceolata, A. latifolia, A. longifolia, A. mollis, A. nevadensis, A. ovata, A. parryi, A. rydbergii, A. sororia
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Arnica dealbata

Arnica chamissonis

leafy arnica, meadow arnica, narrowleaf arnica, silvery arnica, leafy leapordbane

Habit

Perennial from long, naked rhizomes; stems solitary, 2-10 dm. tall; herbage variously pubescent, becoming glandular above.

Leaves

Leaves opposite, sessile, 5-10 pairs, only slightly reduced upward;

leaves lanceolate to oblanceolate, entire or slightly toothed, 5-30 cm. long and 1-4 cm. wide.

Flowers

Heads several, the involucre 8-12 mm. high, the herbaceous bracts sub-equal, usually obtuse, with a tuft of long, white hairs;

ray flowers pale yellow, usually 13, pistillate, 1.5-2 cm. long;

disk flowers yellow, perfect;

pappus somewhat tawny, barbellate.

Fruits

Achene with short hairs, somewhat glandular.

Arnica dealbata

Arnica chamissonis

Flowering time

June-September

Habitat

Meadows and wet places from middle elevations to the subalpine.

Distribution

[WildflowerSearch map]

[BONAP county map]

Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa