Burke: Hosackia pinnata

	Hosackia pinnata
	meadow bird's-foot-trefoil, meadow deervetch
Habit	Glabrous perennial from a taproot and short rhizome, the stem hollow, sprawling to erect, 1.5-6 dm. tall.
Leaves	: Leaves odd-pinnate, 4-8 cm. long with short petioles; leaflets 5-9, elliptic to obovate, 1-2 cm. long; stipules membranous, 3-10 mm. long.
Flowers	Inflorescence of head-like umbels on elongate peduncles, with simple or no bracts; umbels 3- to 12-flowered, with very short pedicels; flowers 10-15 mm. long, pea-like; calyx tubular, 4-8 mm. long, the 2 upper teeth joined most of their length, the lower 3 awl-shaped; corolla with yellow banner and keel, and white wings, considerably exceeding the calyx.
Fruits	Pod 3-6 cm. long, 1.5-2 mm. broad.

	Hosackia pinnata
Flowering time	May-July
Habitat	Moist areas and wetlands, lowland to montane.
Distribution	Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington, but also in far eastern Washington; southwestern British Columbia to California, also in western Idaho. [WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Not of concern
Sibling taxa	H. crassifolia, H. gracilis, H. rosea
Web links	Local floras: BC, CA, OR, WA 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

Hosackia pinnata

meadow bird's-foot-trefoil, meadow deervetch

Habit

Glabrous perennial from a taproot and short rhizome, the stem hollow, sprawling to erect, 1.5-6 dm. tall.

Leaves

: Leaves odd-pinnate, 4-8 cm. long with short petioles;

leaflets 5-9, elliptic to obovate, 1-2 cm. long;

stipules membranous, 3-10 mm. long.

Flowers

Inflorescence of head-like umbels on elongate peduncles, with simple or no bracts;

umbels 3- to 12-flowered, with very short pedicels;

flowers 10-15 mm. long, pea-like;

calyx tubular, 4-8 mm. long, the 2 upper teeth joined most of their length, the lower 3 awl-shaped;

corolla with yellow banner and keel, and white wings, considerably exceeding the calyx.

Fruits

Pod 3-6 cm. long, 1.5-2 mm. broad.

Hosackia pinnata

Flowering time

May-July

Habitat

Moist areas and wetlands, lowland to montane.

Distribution

Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington, but also in far eastern Washington; southwestern British Columbia to California, also in western Idaho.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa

H. crassifolia, H. gracilis, H. rosea

Web links