Calflora, a 501c3 non-profit
Taxon  Report  
Trifolium howellii  S. Watson
Canyon clover,   Howell's clover
Trifolium howellii is a perennial herb that is native to California, and also found in Oregon.
California Rare Plant Rank: 4.3 (limited distribution).   CNDDB
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
Observation Search
(78 records)
one or more occurrences
within a 7.5-minute quadrangle

Bloom Period
Genus: Trifolium
Family: Fabaceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Wetlands: Occurs usually in wetlands, occasionally in non wetlands

Habitat: meadows

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

Name Status:
Accepted by JEF + CNPS + PLANTS
Information about  Trifolium howellii from other sources
Nursery availability from CNPLX
Commercial availability unknown.
Jepson eFlora

USDA PLANTS Profile (TRHO)

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Photos on iNaturalist

ID Tips on PlantID.net


Suggested Citation
Calflora: Information on California plants for education, research and conservation, with data contributed by public and private institutions and individuals, including the Consortium of California Herbaria. [web application]. 2022. Berkeley, California: The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 11/29/2022).