Page authors: Don Knoke, David Giblin
Hydrophyllum tenuipes
Pacific waterleaf

Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.

Habitat: Forest understory and edge at low elevations, often where moist.

Flowers: May-July

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees


Herbaceous, stiff-hairy perennial from a rhizome, the solitary flowering stem 2-8 dm. tall.


Leaves few, long-petiolate, alternate, large, the blades up to 15 cm. long and wide, thinly close-hairy on both sides, pinnipalmately divided into 5 pointed, sharply-toothed leaflets.


Flowers in loose clusters on long peduncles, about equaling the leaves; calyx lobes 4-6 mm. long with bristles on the edges; corolla 5-7 mm. long, usually greenish-white; stamens 5, the filaments exerted, attached near the bottom of the corolla tube, each flanked by a pair of linear appendages; style exerted, 2-cleft.


Fruit a capsule.

Accepted Name:
Hydrophyllum tenuipes A. Heller
Publication: Bull. Torrey Bot. Club 25(11): 582. 1898.

Synonyms & Misapplications:
Hydrophyllum viridulum G.N. Jones
Additional Resources:

PNW Herbaria: Specimen records of Hydrophyllum tenuipes in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Hydrophyllum tenuipes checklist entry

OregonFlora: Hydrophyllum tenuipes information

E-Flora BC: Hydrophyllum tenuipes atlas page

CalPhotos: Hydrophyllum tenuipes photos

43 photographs:
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