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Allium monticola
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San Bernardino Mountains Onion
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Allium monticola

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About San Bernardino Mountains Onion (Allium monticola) Allium monticola is an uncommon species of wild onion known by the common name San Bernardino Mountains onion. It is endemic to southern California, where it is found in the Transverse Ranges and the northernmost section of the Peninsular Ranges. It has been reported from San Bernardino, Los Angeles, Orange, Ventura and Santa Barbara Counties. Allium monticola generally grows in rocky areas at elevations 1400-3200 m. This onion grows from a bulb one or two centimeters long which often has daughter bulbs attached to it on stalks. The waxy stem reaches a maximum height near 25 centimeters and the single leaf may be a bit longer. The inflorescence contains up to about 25 flowers, each with tepals nearly two centimeters long and white or light pink with darker pink tips. Pollen and anthers are yellow.
Plant Description
Plant Type
Perennial herb

Max. Height
9.8 in (24.9 cm)

Flower Color
Pink, White

Native Status

Natural Setting
Elevation ?
2587' - 10055'

Annual Precip. ?
6.5" - 52.0"

Summer Precip. ?
0.32" - 2.83"

Coldest Month ?
32.2° F - 48.5° F

Hottest Month ?
52.7° F - 77.3° F

Humidity ?
2.21 vpd - 28.80 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
San Bernardino Mountain 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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