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Taxon  Report  
Pseudotrillium rivale  (S. Watson) S. B Farmer
Siskiyou wakerobin
Pseudotrillium rivale is a perennial herb that is native to California, and found only slightly beyond California borders.
also called Trillium rivale
Siskiyou Del Norte Modoc Humboldt Shasta Lassen Trinity Plumas Tehama Butte Mendocino Glenn Sierra Yuba Lake Nevada Colusa Placer Sutter El Dorado Yolo Alpine Napa Sonoma Sacramento Mono Amador Solano Calaveras Tuolumne San Joaquin Marin Contra Costa Alameda Santa Cruz Mariposa Madera San Francisco San Mateo Merced Fresno Stanislaus Santa Clara Inyo San Benito Tulare Kings Monterey San Bernardino San Luis Obispo Kern Santa Barbara Ventura Los Angeles Riverside Orange San Diego Imperial
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Bloom Period
Genus: Pseudotrillium
Family: Melanthiaceae  
Category: angiosperm  
Jepson eFlora section: monocot

Ultramafic affinity: 4 - broad endemic / strong indicator

Communities: Yellow Pine Forest

Name Status:
Accepted by JEF

Alternate Names:
JEFTrillium rivale
PLANTSTrillium rivale
Information about  Pseudotrillium rivale from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

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[Wikipedia] Etymology, Uses: Pseudotrillium is a monotypic genus of flowering plant in the family Melanthiaceae. Its sole species, Pseudotrillium rivale, is commonly known as the brook wakerobin.[5] It is endemic to the Siskiyou Mountains of southern Oregon and northern California. The Latin specific epithet rivale means ?growing by streams?, with reference to a preferred habitat.[6] Uses Under its former name, Trillium rivale, this plant has gained the Royal Horticultural Society's Award of Garden Merit.[17][18] Hardy down to ?10 C (14 F), it requires a sheltered position in partial or full shade.[17] (contributed by Mary Ann Machi)


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals. [web application]. 2024. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 04/13/2024).