California Native Plant Society
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Allium lacunosum
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Pitted Onion
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Allium lacunosum

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About Pitted Onion (Allium lacunosum) Allium lacunosum is a species of wild onion known by the common name pitted onion. It is endemic to California, where it is a common member of the flora in many types of habitat, from bayside to mountain to desert. This onion grows from a thick-coated yellowish-brown bulb one or two centimeters long. The stem reaches up to about 35 centimeters in maximum height and there are usually two leaves which may be as long or longer than the stem. The flower cluster contains up to 45 dark-veined white to pale pink flowers, each less than a centimeter long. There are four varieties of this species, three of which are somewhat uncommon.
Plant Description
Plant Type
Perennial herb

Max. Height
1.2 ft (0.37 m)

Flower Color
White, Pink

Native Status

Natural Setting
Site Type
Dry open slopes


Elevation ?
-74' - 7305'

Annual Precip. ?
4.0" - 49.3"

Summer Precip. ?
0.17" - 2.26"

Coldest Month ?
33.5° F - 59.3° F

Hottest Month ?
60.7° F - 86.2° F

Humidity ?
0.84 vpd - 38.86 vpd

Landscaping Information
Common uses
Bee Gardens

Nursery Availability
Never or Almost Never Available

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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