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Astragalus pomonensis
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Pomona Milk Vetch
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Astragalus pomonensis

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About Pomona Milk Vetch (Astragalus pomonensis) Astragalus pomonensis is a species of milkvetch known by the common name Pomona milkvetch. It is native to Baja California and southern California, where it can be found in a number of coastal habitats, including the California Coast Ranges. This is a bushy perennial herb forming a clump of thick, hollow stems up to about 80 centimeters tall. Leaves are up to 20 centimeters long and are made up of many oval-shaped leaflets each up to 3 centimeters in length. The flower cluster is a large array of up to 45 cream-colored flowers. Each flower is between one and two centimeters long. The fruit is a bladdery legume pod which dries to a thin, almost transparent papery texture. It may exceed 4 centimeters in length and generally drops off the plant when dry.
Plant Description
Plant Type
Perennial herb

Max. Height
0.8 - 2.6 ft (0.24 - 0.8 m)

Flower Color

Flowering Season

Native Status

Natural Setting
Site Type
Shrubby, grassy, or weedy places

Sun, Part Shade

Elevation ?
0' - 5917'

Annual Precip. ?
4.1" - 34.4"

Summer Precip. ?
0.17" - 2.72"

Coldest Month ?
39.9° F - 59.5° F

Hottest Month ?
62.6° F - 87.9° F

Humidity ?
0.68 vpd - 38.78 vpd

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

Nursery Availability
Sometimes Available

Other Names
Common Names
Pomona Milkvetch

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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