E-Flora BC: Electronic Atlas of the Flora of British Columbia

Trillium ovatum var. ovatum
western trillium
(Previously in Liliaceae)

Introduction to Vascular Plants

© Rod Innes  Email the photographer   (Photo ID #6683)

E-Flora BC Static Map
Distribution of Trillium ovatum var. ovatum
Click here to view our interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.

Perennial herb from a short, stout, fleshy rhizome; flowering stems erect, 10-45 cm tall, unbranched, smooth throughout.
Stem leaves usually 3 in a whorl, 5-18 cm long, often as wide, broadly egg-diamond-shaped to triangular egg-shaped, smooth, unstalked or nearly so, the margins entire; basal leaves lacking.
Inflorescence a solitary, terminal, stalked flower, the stalk 1-8 cm long; flowers star-shaped, erect to nodding; petals 3, white turning pale pink to purple with age, sometimes pinkish initially, egg-shaped, 3-6 cm long; sepals 3, green and leaf-like, lanceolate to oblong, somewhat shorter than petals; stamens 6; pistil 1, 3-chambered.
Capsules, berry-like, green to yellowish, broadly egg-shaped, with wing-like ridges; seeds numerous, large, egg-shaped, in a sticky mass when first shed.
Two varieties occur in BC:

1. Plants 20-45 cm tall; flowers opening white; the common variety........................ var. ovatum

1. Plants 10-20 cm tall; flowers opening pink; rare on western Vancouver Island..................... var. hibbersonii (Taylor & Szczawinski) Douglas & Pojar

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist forests in the lowland, steppe and montane zones (var. ovatum), and mossy bluff ledges and river boulders in the lowland zone (var. hibbersonii); common in S BC, south of 50degreeN; E to SW AB and S to CO and CA.

Source: The Illustrated Flora of British Columbia


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References