Burke: Antennaria rosea vs. Antennaria howellii

	Antennaria rosea	Antennaria howellii
		Howell's pussytoes
Habit	Dioecious, mat-forming, stoloniferous perennial 5-40 cm. tall; stolons up to 10 cm. long, decumbent; upper surface of the stems with stalked glands, the hairs white or purple.	Perennial with usually leafy stolons and upright stems 1.5-4 dm. tall.
Leaves	Leaves 1-nerved; upper surface of the leaves covered with silvery-white hairs; basal leaves spatulate or oblanceolate with a wedge-shaped base; cauline leaves linear, alternate.	Basal leaves spatulate, oblanceolate or obovate, persistently white-woolly beneath and glabrous and green above, up to 2 cm. wide; cauline leaves few, linear and sessile.
Flowers	Heads several in a sub-capitate cyme; pistillate involucres 4-10 mm. long; scarious portion of the involucre bracts white, straw-colored or light yellow.	Heads several in a crowded inflorescence; pistillate involucres 6-9 mm. high, the bracts narrow and long-pointed, the scarious portion dingy whitish; pappus surpassing the stigmas; staminate plants very rare in our range.
Fruits	Achene.	Achene terete.

	Antennaria rosea	Antennaria howellii
Identification notes		The green upper surface of the leaves separates Antennaria howellii from all other species except A. racemosa. The latter usually has an open inflorescence, broader and larger leaves, and glands on the upper stem.
Flowering time	June-August	May-July
Habitat	Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.	Rocky or sandy slopes, dry to moist grasslands, and forest openings at low to middle elevations.
Distribution	Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada. [WildflowerSearch map] [BONAP county map]	Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America. [WildflowerSearch map] [BONAP county map]
Origin	Native	Native
Conservation status	Not of concern	Not of concern
Sibling taxa	A. alpina, A. anaphaloides, A. corymbosa, A. dimorpha, A. flagellaris, A. geyeri, A. howellii, A. lanata, A. luzuloides, A. media, A. microphylla, A. monocephala, A. parvifolia, A. pulcherrima, A. racemosa, A. stenophylla, A. umbrinella	A. alpina, A. anaphaloides, A. corymbosa, A. dimorpha, A. flagellaris, A. geyeri, A. lanata, A. luzuloides, A. media, A. microphylla, A. monocephala, A. parvifolia, A. pulcherrima, A. racemosa, A. stenophylla, A. umbrinella
Subordinate taxa		A. howellii ssp. howellii, A. howellii ssp. neodioica
Web links	Local floras: BC, CA, OR 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	Local floras: BC, OR, WA Local Web sites: 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

Antennaria howellii

Howell's pussytoes

Habit

Dioecious, mat-forming, stoloniferous perennial 5-40 cm. tall; stolons up to 10 cm. long, decumbent; upper surface of the stems with stalked glands, the hairs white or purple.

Perennial with usually leafy stolons and upright stems 1.5-4 dm. tall.

Leaves

Leaves 1-nerved;

upper surface of the leaves covered with silvery-white hairs;

basal leaves spatulate or oblanceolate with a wedge-shaped base;

cauline leaves linear, alternate.

Basal leaves spatulate, oblanceolate or obovate, persistently white-woolly beneath and glabrous and green above, up to 2 cm. wide;

cauline leaves few, linear and sessile.

Flowers

Heads several in a sub-capitate cyme; pistillate involucres 4-10 mm. long; scarious portion of the involucre bracts white, straw-colored or light yellow.

Heads several in a crowded inflorescence; pistillate involucres 6-9 mm. high, the bracts narrow and long-pointed, the scarious portion dingy whitish;

pappus surpassing the stigmas; staminate plants very rare in our range.

Fruits

Achene.

Achene terete.

The green upper surface of the leaves separates Antennaria howellii from all other species except A. racemosa. The latter usually has an open inflorescence, broader and larger leaves, and glands on the upper stem.

Flowering time

June-August

May-July

Habitat

Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.

Rocky or sandy slopes, dry to moist grasslands, and forest openings at low to middle elevations.

Distribution

Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada.

[WildflowerSearch map]

[BONAP county map]

Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa