Burke: Geum macrophyllum

	Geum macrophyllum
	bigleaf avens, large-leaved avens
Habit	Herbaceous perennial from a short rhizome, the 1-several pubescent stems 3-7 dm. tall.
Leaves	Basal leaves several, the blades lyrate-pinnatifid, up to 3 dm. long; leaflets 9-23, triangular-ovate to cordate, the terminal one much the largest, up to 15 cm. wide; cauline leaves 2-5, with leaf-like stipules.
Flowers	Flowers several in an open, asymmetrical inflorescence; calyx saucer-shaped, the 5 lobes 4-5 mm. long, reflexed, alternating with 5 simple bracteoles; petals 5, yellow, 4-6 mm. long; stamens and pistils numerous.
Fruits	Achenes compressed, elliptic, 3 mm. long, the style bent and divided at mid-length, the lower segment 4 mm. long, reddish, hooked at the tip, the upper segment 1-1.5 mm. long, yellowish.

	Geum macrophyllum
Flowering time	April-August
Habitat	Common in moist woods and meadows from sea level to subalpine.
Distribution	Widely distributed on both sides of the Cascades crest in Washington; Alaska to Baja California, east to the Great Plains and east across Canada to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Native
Conservation status	Not of concern
Sibling taxa	G. aleppicum, G. rivale, G. rossii, G. triflorum, G. urbanum
Web links	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

Geum macrophyllum

bigleaf avens, large-leaved avens

Habit

Herbaceous perennial from a short rhizome, the 1-several pubescent stems 3-7 dm. tall.

Leaves

Basal leaves several, the blades lyrate-pinnatifid, up to 3 dm. long;

leaflets 9-23, triangular-ovate to cordate, the terminal one much the largest, up to 15 cm. wide;

cauline leaves 2-5, with leaf-like stipules.

Flowers

Flowers several in an open, asymmetrical inflorescence;

calyx saucer-shaped, the 5 lobes 4-5 mm. long, reflexed, alternating with 5 simple bracteoles;

petals 5, yellow, 4-6 mm. long;

stamens and pistils numerous.

Fruits

Achenes compressed, elliptic, 3 mm. long, the style bent and divided at mid-length, the lower segment 4 mm. long, reddish, hooked at the tip, the upper segment 1-1.5 mm. long, yellowish.

Geum macrophyllum

Flowering time

April-August

Habitat

Common in moist woods and meadows from sea level to subalpine.

Distribution

Widely distributed on both sides of the Cascades crest in Washington; Alaska to Baja California, east to the Great Plains and east across Canada to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Native

Conservation status

Not of concern

Sibling taxa

G. aleppicum, G. rivale, G. rossii, G. triflorum, G. urbanum

Web links