Trillium albidum |
Trillium albidum ssp. parviflorum |
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giant trillium, sessile trillium |
small-flowered trillium |
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Habit | Herbaceous perennial from short and thick rhizomes; stems erect, 20-60 cm tall. | Glabrous, scapose perennials from thick, brown rhizomes, the 1-3 terete scapes 1.7-3 dm. tall. |
Leaves | Leaves 3, whorled, extending outwards past flower, sessile, 7-20 cm long and 12-15 cm wide, generally ovate, apex rounded to obtuse, green, sometimes with brown or purple tinged spots. |
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 | Flowers 1, sessile; sepals 3, free, persistent, green, spreading, 3-6.5 cm, lanceolate; petals 3, erect to ascending, free, withering, white to slightly pale pinkish, base sometimes purple; stamens 6, 15-25 mm, tissue between anther sacs greenish; ovary greenish to purplish, 3-chambered; styles 3. |
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. |
Fruits | Berry-like capsule, green to purplish green, pulpy and juicy; seeds, many, ovoid. |
Capsule sub-globose, maroon, 4-8 mm. long. |
Trillium albidum |
Trillium albidum ssp. parviflorum |
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Flowering time | April-June | March-May |
Habitat | Moist forests, oak-ash woodlands, thickets, and fields at low elevations. | Moist forests, oak-ash woodlands, thickets, and fields at low elevations. |
Distribution | Occurring west of the Cascades crest in Washington; Washington to California.
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Occurring west of the Cascades crest in Washington; lowland western Washington to Willamette Valley, Oregon. |
Origin | Native | Native |
Conservation status | Sensitive in Washington (WANHP) | Sensitive in Washington (WANHP) |
Sibling taxa | ||
Subordinate taxa | ||
Web links |