Page authors: Don Knoke, David Giblin
Trillium albidum ssp. parviflorum
small-flowered trillium

Distribution: Occurring west of the Cascades crest in Washington; lowland western Washington to Willamette Valley, Oregon.

Habitat: Moist forests, oak-ash woodlands, thickets, and fields at low elevations.

Flowers: March-May

Origin: Native

Growth Duration: Perennial

Conservation Status: Sensitive in Washington (WANHP)


Glabrous, scapose perennials from thick, brown rhizomes, the 1-3 terete scapes 1.7-3 dm. tall.


Leaves sessile in a whorl of 3, the blade green with obscure mottling, ovate to broadly ovate, 6.5-16 cm. long and 5-8 cm. wide, not glossy, the tip obtuse.


Flowers solitary and terminal on the scape; sepals 3, green, spreading, lanceolate, 16-25 mm. long and 4-8 mm. wide, entire; petals erect, concealing the stamens and ovary, white, linear to linear-lanceolate, 2.2 cm. long and 0.4-1 cm. wide, entire, the tip obtuse; stamens 6, erect, 10-15 mm. long, the filaments white or purplish-tinged; ovary superior, 3-celled; stigmas 3, erect, green, the outer surface purple.


Capsule sub-globose, maroon, 4-8 mm. long.

Accepted Name:
Trillium albidum J.D. Freeman ssp. parviflorum (V.G. Soukup) K.L. Chambers & S.C. Mey.s
Publication: J. Bot. Res. Inst. Texas 5(2): 620. 2011.

Synonyms & Misapplications:
Trillium albidum J.D. Freeman, misapplied [FNA26, HC2]
Trillium parviflorum V.G. Soukup
Additional Resources:

PNW Herbaria: Specimen records of Trillium albidum ssp. parviflorum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Trillium albidum ssp. parviflorum checklist entry

OregonFlora: Trillium albidum ssp. parviflorum information

E-Flora BC: Trillium albidum ssp. parviflorum atlas page

CalPhotos: Trillium albidum ssp. parviflorum photos

37 photographs:
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