giant white wakerobin
Trillium albidum J.D. Freeman
Giant white wakerobin lifts a single white flower directly from the center of three broad, leaflike bracts. There is no separate stalk between the flower and this green platform. A short, thick rhizome can produce several stout flowering shoots together, forming a close group. Flora of North America: Trillium albidum
Botanical name
Trillium albidum J.D.Freeman is accepted with subspecies albidum and parviflorum. Morphology follows Flora of North America’s large-flowered concept. Kew Plants of the World Online: Trillium albidumFlora of North America: Trillium albidum
Recognizing the plant
In Flora of North America’s large-flowered treatment, shoots reach about 22–58 cm. The broadly egg-shaped bracts carry scattered darker green mottling that may fade later in the season. Long-lasting petals stand upright or spread slightly, overlap toward their bases and partly conceal the stamens. They are white to cream, occasionally flushed pale rose near the base, and about 4.8–8 cm long. The flower has a rose-like fragrance; pale green sepals spread beneath the petals. Flora of North America: Trillium albidum
Bloom window
Western Oregon
In western Oregon, flowering is recorded from March through May. Benton Soil and Water Conservation District: White Trillium
Native range
Kew’s broader species range extends from Washington to west-central California. The large-flowered plants described in Oregon and California occupy moist forest slopes, woodland thickets and stream floodplains. Kew Plants of the World Online: Trillium albidumFlora of North America: Trillium albidum
Botanical sources
- Kew Plants of the World Online: Trillium albidum
- Flora of North America: Trillium albidum
- Benton Soil and Water Conservation District: White Trillium
Reviewed 2026-10-11. Seasonal development varies with location and growing conditions.