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Taxon  Report  
Triantha occidentalis  (S. Watson) R. R. Gates  ssp. occidentalis 
Western false asphodel
Triantha occidentalis ssp. occidentalis is a perennial herb that is native to California, and also found elsewhere in western North America.
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
Parent: Triantha occidentalis
Genus: Triantha
Family: Tofieldiaceae  
(Liliaceae)
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Habitat: meadows

Communities: Douglas-Fir Forest, Yellow Pine Forest, wetland-riparian

Name Status:
Accepted by JEF + PLANTS

Alternate Names:
PLANTSTofieldia glutinosa ssp. occidentalis
PLANTSTofieldia glutinosa var. occidentalis
JEFTofieldia occidentalis ssp. occidentalis
PLANTSTofieldia occidentalis
Information about  Triantha occidentalis ssp. occidentalis from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (TROCO2)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[Wikipedia] History, Carnivory, Range: Botanical history Triantha occidentalis was described by Sereno Watson in 1879 as Tofieldia occidentalis, and reassigned to Triantha by R. R. Gates in 1918.[3][4] The carnivorous behavior of the plant was discovered in 2021 by a group of scientists from the University of British Columbia and the University of Wisconsin?Madison.[5][6] Range The native range of Triantha occidentalis is from Southeast Alaska to Central California. The range includes the US states of Alaska, California, Idaho, Montana, Oregon, Washington, and Wyoming and the Canadian provinces of Alberta and British Columbia.[1] Carnivory Triantha occidentalis is a carnivorous plant; the flower stems are covered in a sticky substance, and have tiny hairs that produce a digestive enzyme, a phosphatase. The sticky substance is able to trap small insects, which are digested by the enzyme from the hairs, allowing the plant to absorb their nutrients.[7][5] Other carnivorous plants have insect traps well away from flowers, in positions where pollinating insect such as bees and butterflies are not affected; T. occidentalis's sticky flower stems are only able to trap smaller insects such as fruit flies.[5][8] It was not suspected that T. occidentalis, which grows near urban centers, was carnivorous until it was found to have a genetic deletion sometimes seen in carnivorous plants, prompting investigation. The plant is, as of 2021, the only one known to trap insects this unsuspected way, but it has been suggested that there may be more.[7][8] Subspecies The following subspecies are accepted:[1] Triantha occidentalis subsp. brevistyla (C.L.Hitchc.) Packer Triantha occidentalis subsp. montana (C.L.Hitchc.) Packer Triantha occidentalis subsp. occidentalis (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]. 2023. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 12/01/2023).