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San Joaquin Milk Vetch Back to Plant Page
Astragalus asymmetricus

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About San Joaquin Milk Vetch (Astragalus asymmetricus) Astragalus asymmetricus is a species of milkvetch known by the common name San Joaquin milkvetch. It is endemic to California, where it grows in grassy and disturbed areas in the Central Valley and nearby parts of the Central Coast Ranges and San Francisco Bay Area. This is a sturdy perennial herb growing a thick, erect stem to heights between 50 and 120 centimeters. It is coated in long hairs. The leaves are up to 20 centimeters long and are made up of many pairs of leaflike leaflets, each up to 2.5 centimeters long and varying in shape from linear to oval. The flower cluster contains 15 to 45 cream-colored pealike flowers 1 to 2 centimeters long. The fruit is a slightly inflated hairy legume pod up to 4 centimeters long which hangs in bunches from the dried flower cluster.
Plant Description
Plant Type
Perennial herb

Max. Height
1.6 - 3.9 ft (0.49 - 1.2 m)

Flower Color

Native Status

Natural Setting
Site Type
Grassy and open places

Sun, Part Shade

Elevation ?
7' - 3652'

Annual Precip. ?
7.4" - 34.6"

Summer Precip. ?
0.15" - 0.58"

Coldest Month ?
40.0° F - 53.9° F

Hottest Month ?
63.6° F - 78.8° F

Humidity ?
0.71 vpd - 25.88 vpd

Landscaping Information
Nursery Availability
Rarely Available

Other Names
Common Names
San Joaquin 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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