Geranium oreganum
sticky geranium, western geranium

Distribution: Occurring west of the Cascades crest in southwestern Washington, where known historically; southwestern Washington to northern California.

Habitat: Meadows and woodlands.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Presumed extirpated in Washington (WANHP)

Pollination: Bumblebees, bees, flies, wasps, beetles


Perennial, the stems 4-8 dm. tall, covered with stalked glands above.


Leaves long-petiolate, the blades with stiff hairs on both surfaces, 6-14 cm. broad, divided palmately nearly to the base into 5-7 wedge-shaped, lobed segments.


Flowers showy, few, the long peduncles with leaf-like bracts; sepals 5, 9-12 mm. long with bristle-tips 2-3 mm. long; petals 5, 18-24 mm. long, reddish-purple; stamens 10, the filaments with hairs near the base; stylar column 2.5-5 cm long, stigmas 3-6 mm.


Mericarps 5, 4.5-5 mm, not wrinkled, sparsely bristly, glandular; seeds pitted.

Accepted Name:
Geranium oreganum Howell
Publication: A Flora of Northwest America 1: 106-107. 1897.

Synonyms & Misapplications:
Geranium albiflorum Hook. var. incisum Torr. & Gray [KZ99]
Geranium incisum Nutt.
Additional Resources:

PNW Herbaria: Specimen records of Geranium oreganum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Geranium oreganum checklist entry

OregonFlora: Geranium oreganum information

E-Flora BC: Geranium oreganum atlas page

CalPhotos: Geranium oreganum photos

17 photographs:
Group by