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Allium obtusum  Lemmon
Red sierra onion
© 2003 Steve Matson
© 2003 Steve Matson
© 2005 Steve Matson
© 2005 Steve Matson
© 2005 Steve Matson
© 2009 Steve Matson
© 2016 mark kircher
© 2019 R.A. Chasey
© 2019 R.A. Chasey
© 2020 Bob Sweatt
© 2022 richard mcneill
© 2022 richard mcneill
© 2023 Bob Sweatt
© 2023 Bob Sweatt
© 2023 Bob Sweatt
© 2015 BOB CASE
© 2015 BOB CASE
© 2019 Karen Swift
© 2020 Bob Sweatt
© 2020 Bob Sweatt
© 2022 richard mcneill
Allium obtusum is a perennial herb (bulb) that is native to California, and endemic (limited) to California.
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
Subspecies and Varieties:
Genus: Allium
Family: Alliaceae  
(Liliaceae)
Category: angiosperm  
PLANTS group:Monocot
Jepson eFlora section: monocot

Habitat: slopes

Communities: Lodgepole Forest, Subalpine Forest

Name Status:
Accepted by JEF + JEF + PLANTS + POWO

Information about  Allium obtusum from other sources
Nursery availability from CNPLX
This plant is available commercially.
Jepson eFlora

USDA PLANTS Profile (ALOB)

Photos on Calflora

Photos on CalPhotos

Google Images

Photos on iNaturalist

ID Tips on PlantID.net

[Wikipedia] Description: Unlike Allium campanulatum, A. obtusum has leaves that do not wither before the flowers bloom. Atop the scape is an umbel of up to 60 flowers, each of which may be 4 to 12 millimeters wide. The tepals are white, purple, or pink with dark purple midveins. Anthers are yellow or purple; pollen purple. (link added 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]. 2025. The Calflora Database [a non-profit organization]. Available: https://www.calflora.org/   (Accessed: 03/30/2025).