Host an Event Volunteer Join Tickets

Support the plant database you love!


Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or you can choose a plant family:
Trillium petiolatum (Idaho trillium)
Bransford, W.D. and Dolphia

Trillium petiolatum

Trillium petiolatum Pursh

Idaho Trillium, Idaho Wake-robin, Roundleaf Trillium, Roundleaf Wake-robin

Liliaceae (Lily Family)


USDA Symbol: TRPE3

USDA Native Status: L48 (N)

Trillium petiolatum, from eastern Washington and Oregon, bears its leaves on long stalks and features flowers with dark red-brown petals.


From the Image Gallery

1 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Herb
Leaf Complexity: Simple
Fruit Type: Berry
Size Notes: Scape up to about 6 inches tall.

Bloom Information

Bloom Color: Red , Yellow , Green
Bloom Time: Apr , May , Jun
Bloom Notes: Maroon-red, purple, or greenish to yellowish.



Mr. Smarty Plants says

Pictures and sources for black trilliums
June 10, 2008
Do you have pictures and/or sources for Black Trilliums?
view the full question and answer

Web Reference

Webref 62 - Burke Herbarium Image Collection (2020) University of Washington
Webref 38 - Flora of North America (2019) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

From the Archive

Wildflower Newsletter 1987 VOL. 4, NO.1 - One Million Bequest Announced, Lady Bird Johnson On Celebrating Four Years, Spri...

Additional resources

USDA: Find Trillium petiolatum in USDA Plants
FNA: Find Trillium petiolatum in the Flora of North America (if available)
Google: Search Google for Trillium petiolatum


Record Modified: 2023-04-12
Research By: TWC Staff

Go back