California Native Plant Society
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Allium serra
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Jeweled Onion
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Allium serra

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About Jeweled Onion (Allium serra) Allium serra is a species of wild onion known by several common names, including jeweled onion, pom-pon onion, and serrated onion. It is endemic to northern California. It favors hard soils with rock and clay, including serpentine soil. The plant comes from a small herringbone-patterned bulb an average of one centimeter in diameter. It has a long stem on which it bears a tightly bunched flower cluster of flowers. The attractive bright pink flowers are thimble or bell-shaped, often iridescent when new and becoming papery as they dry.
Plant Description
Plant Type
Perennial herb

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Grassy slopes


Elevation ?
30' - 5118'

Annual Precip. ?
9.0" - 99.5"

Summer Precip. ?
0.18" - 2.79"

Coldest Month ?
40.7° F - 55.4° F

Hottest Month ?
62.8° F - 75.5° F

Humidity ?
1.50 vpd - 24.88 vpd

Landscaping Information
Ease of Care
Moderately Easy

Water Requirement ?
Very Low
Extremely Low
Very Low
Moderate - High

Common uses
Bee Gardens

Nursery Availability
Rarely Available

Other Names
Common Names
Serrated Onion, Pom-pon Onion

Sources include: Wikipedia. All text shown in the "About" section of these pages is available under the Creative Commons Attribution-ShareAlike License. Plant observation data provided by the participants of the California Consortia of Herbaria, Sunset information provided by Jepson Flora Project. Propogation from seed information provided by the Santa Barbara Botanical Garden from "Seed Propagation of Native California Plants" by Dara E. Emery. Sources of plant photos include CalPhotos, Wikimedia Commons, and independent plant photographers who have agreed to share their images with Calscape. Other general sources of information include Calflora, CNPS Manual of Vegetation Online, Jepson Flora Project, Las Pilitas, Theodore Payne, Tree of Life, The Xerces Society, and information provided by CNPS volunteer editors, with special thanks to Don Rideout. Climate data used in creation of plant range maps is from PRISM Climate Group, Oregon State University, using 30 year (1981-2010) annual "normals" at an 800 meter spatial resolution.

Links:   Jepson eFlora Taxon Page  CalPhotos  Wikipedia  Calflora

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