Coast Trillium vs Green Trillium

Trillium ovatum compared with Trillium viride

Taxonomic Classification

Rank	Coast Trillium	Green Trillium
Kingdom same	Plantae (พืช)	Plantae (พืช)
Phylum same	Magnoliophyta (Flowering Plants)	Magnoliophyta (Flowering Plants)
Class same	Liliopsida (Monocots)	Liliopsida (Monocots)
Order same	Liliales (Liliales)	Liliales (Liliales)
Family same	Melanthiaceae	Melanthiaceae
Genus same	Trillium	Trillium
Species	Trillium ovatum	Trillium viride

Evolutionary Relationship

Coast Trillium and Green Trillium share a common ancestor at the Genus level: Trillium.

Conservation Status

Coast Trillium

LC — Least Concern

Green Trillium

LC — Least Concern

Physical Characteristics

Attribute	Coast Trillium	Green Trillium
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Coast Trillium

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Range

Found in United States.

Green Trillium

Habitat

Typically found in grasslands, wetlands, forests, and cultivated landscapes.

Coast Trillium

Coast trillium (Trillium ovatum) is a spring-flowering perennial herb in the family Melanthiaceae, native to moist, shaded forests of western North America from British Columbia and Alberta south through the Pacific states to central California and east to Montana and Idaho. It grows in mixed conifer and deciduous forest understories, redwood forest, riparian woodland, and coastal range foothills, typically in deep, humus-rich, well-drained soils. Like all trilliums, it produces a whorl of three broad leaves, a single three-petalled flower that opens white and turns pink to deep rose with age, and takes many years to reach flowering maturity from seed. Seeds are dispersed by ants (myrmecochory) attracted to the oil-rich elaiosome attached to each seed. Coast trillium is assessed as Least Concern by the IUCN, though it is a legally protected plant in some US states due to its slow reproductive rate making populations sensitive to disturbance. Illegal collection from the wild for horticulture remains a concern. It is one of the most beloved wildflowers of the Pacific Northwest and is widely cultivated in woodland gardens.