UW Burke Herbarium species comparison

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Trillium cernuum

Trillium petiolatum

purple trillium, purple wakerobin
Habit Glabrous perennial herbs from short, thick rhizomes, the annual stems largely subterranean, 5-18 cm. long.
Leaves

Leaves 3, whorled, not mottled, long-petiolate;

leaf blade nearly orbicular to broadly ovate, rounded or nearly cordate at the base, rounded at the tip, 8-13 cm. long and wide.
Flowers

Flower solitary, sessile;

sepals 3, green, narrowly oblong-elliptic, 2.5-6 cm. long;

petals 3, usually reddish-purple, but sometimes yellowish, greenish or brownish, about the same size and shape as the sepals;

stamens 6, filaments 1-3 mm. long, anthers 10-30 mm. long, purple.
Fruits

Fruit a fleshy capsule.

Trillium cernuum

Trillium petiolatum
Flowering time April-June
Habitat Stream banks, moist meadows, forest edge, and thickets at low to middle elevations in the mountains.
Distribution
[WildflowerSearch map]
[BONAP county map]
Occurring east of the Cascades crest in Washington; Washington to northeastern Oregon, east to Idaho.
[WildflowerSearch map]
[BONAP county map]
Origin Native
Conservation status Not of concern
Sibling taxa
T. albidum, T. ovatum, T. petiolatum
T. albidum, T. ovatum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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