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Romneya trichocalyx  Eastw.
Bristly matilija poppy,   Hairy matilija poppy
© 2022 Ken Lunders
© 2025 Ron Vanderhoff
© 2019 Bryant Baker
© 2005 Brent Miller
© 2012 Sherie Hubble
© 2020 David Greenberger
© 2021 Darl J. Dumont
© 2025 Ron Vanderhoff
© 2025 Ron Vanderhoff
© 2025 Ron Vanderhoff
© 2023 David Wolfson
© 2012 Sherie Hubble
© 2012 Sherie Hubble
© 2012 Sherie Hubble
© 2020 Kimberly Coates
© 2020 Kimberly Coates
© 2021 Ken Lunders
© 2021 Linda Pardy
© 2020 Bob Dollins
© 2003 Hartmut Wisch
Romneya trichocalyx is a perennial herb that is native to California, and found only slightly beyond California borders.
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: Romneya
Family: Papaveraceae  
Category: angiosperm  
PLANTS group:Dicot
Jepson eFlora section: eudicot

Communities: Coastal Sage Scrub, Chaparral
Name Status:
Accepted by JEF + PLANTS + POWO

Alternate Names:
PLANTSRomneya coulteri var. trichocalyx
Information about  Romneya trichocalyx from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (ROTR2)

Photos on Calflora

Photos on CalPhotos

Google Images

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. [web application]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 05/02/2025).