Geum macrophyllum
bigleaf avens, largeleaved avens
WTU specimens
Other herbaria

Distribution: Both sides of the Cascades, Alaska to Baja California, east through Canada to Nova Scotia

Habitat: Common in moist woods and meadows from sea level to subalpine

Flowers: April - August

Origin: Native

Conservation Status: Not of concern

Description:
General:

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.

Accepted Name:
Geum macrophyllum Willd.

Synonyms:
Geum macrophyllum Willd. ssp. macrophyllum
Geum macrophyllum Willd. ssp. perincisum (Rydb.) Hultén
Geum macrophyllum Willd. var. macrophyllum [HC]
Geum macrophyllum Willd. var. perincisum (Rydb.) Raup [HC]
Geum macrophyllum Willd. var. rydbergii Farw.
Geum oregonense (Scheutz) Rydb.
Geum perincisum Rydb.
Geum perincisum Rydb. var. intermedium B. Boivin
Additional Resources:

PNW Herbaria: Specimen records of Geum macrophyllum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Geum macrophyllum checklist entry.

E-Flora BC: Geum macrophyllum atlas page.

CalPhotos: Geum macrophyllum photos.

USDA Plants: Geum macrophyllum information.

54 photographs:
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