Page authors: Ben Legler, David Giblin
Geum rossii
Ross's avens

Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington; Alaska to California, east to the Rocky Mountains, and eastward across northern Canada to Greenland; also in Far East Russia.

Habitat: Arctic tundra, high gravelly meadows and scree slopes.

Flowers: June- August

Origin: Native

Conservation Status: Endangered in Washington (WANHP)


Herbaceous perennial from thick, scaly rhizomes, forming dense clumps up to 3 dm. broad, the simple, pubescent flowering stems 8-20 cm. tall.


Basal leaves numerous, the blades oblong, 4-10 cm. long, interruptedly pinnate or pinnatifid, the main segments entire and linear (the lower ones) or elliptic and toothed; cauline leaves several, alternate, much reduced.


Flowering stems single- or few-flowered; calyx funnel-shaped, purplish, the 5 lobes 6-10 mm. long, the 5 bracteoles 3-4 mm. long; petals 5, spreading, obovate, yellow, blunt-tipped, 6-12 mm. long; stamens 50-70; pistils few to many on a short columnar receptacle.


Achenes lanceolate, 2.5-4 mm. long, hairy, the styles persistent, straight, glabrous, about as long as the achenes.

Accepted Name:
Geum rossii (R. Br.) Ser.
Publication: in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 2: 553. 1825.

Synonyms & Misapplications:
Geum rossii (R. Br.) Ser. var. depressum (Greene) C.L. Hitchc. [HC]
Geum rossii (R. Br.) Ser. var. rossii [HC]
Geum rossii (R. Br.) Ser. var. turbinatum (Rydb.) C.L. Hitchc. [HC]
Additional Resources:

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

WA Flora Checklist: Geum rossii checklist entry.

E-Flora BC: Geum rossii atlas page.

CalPhotos: Geum rossii photos.

USDA Plants: Geum rossii information.

5 photographs:
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