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Stanislaus Milkvetch
Astragalus oxyphysus
  


About Stanislaus Milkvetch (Astragalus oxyphysus) Astragalus oxyphysus is a species of milkvetch known by the common name Mt. Diablo milkvetch. It is endemic to central California, where it grows in dry grassland and scrub habitat in the Central Valley and the adjacent Inner Coast Ranges and Sierra Nevada foothills. Astragalus oxyphysus is a robust perennial herb forming clumps of erect, leafy stems up to 80 centimeters tall. Leaves are up to 17 centimeters long and are made up of many lance-shaped leaflets. The plant flowers in large inflorescences of up to 65 flowers each. Astragalus oxyphysus is a robust perennial herb forming clumps of erect, leafy stems up to 80 centimeters tall. Leaves are up to 17 centimeters long and are made up of many lance-shaped leaflets. The plant flowers in large inflorescences of up to 65 flowers each. The individual flower is cream-colored and at least 2 centimeters long. The fruit is a hanging legume pod up to 4 centimeters long. It is inflated but narrow and dries to a thin, almost transparent papery texture.
Plant Description
Plant Type
Perennial herb

Max. Height
1 - 2.6 ft (0.3 - 0.8 m)

Flower Color
Green

Native Status
Native

Natural Setting
Elevation ?
40' - 4604'

Annual Precip. ?
5.2" - 26.7"

Summer Precip. ?
0.12" - 0.65"

Coldest Month ?
40.2° F - 53.7° F

Hottest Month ?
59.5° F - 78.8° F

Humidity ?
0.97 vpd - 30.10 vpd

Landscaping Information
Nursery Availability
Never or Almost Never Available

Other Names
Common Names
Mt. Diablo Milk-vetch, Mt. Diablo 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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