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Astragalus oophorus
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Egg Milkvetch
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Astragalus oophorus
  

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About Egg Milkvetch (Astragalus oophorus) Astragalus oophorus is a species of milkvetch known by the common name egg milkvetch. It is native to the western United States, mainly California and Nevada, though one variety can be found as far east as Colorado. It is a plant of sagebrush and other dry habitat. Astragalus oophorus is a perennial herb with a stout, mostly hairless stem reaching up to about 30 centimeters in length. Leaves are up to 15 centimeters long and are made up of many oval to rounded leaflets. The inflorescence is an array of 4 to 10 flowers each up to 2 or 2. 5 centimeters long. The flowers are cream-colored or reddish purple with white tips. The fruit is an inflated legume pod, oval in shape and bladder-like, reaching 2 to over 5 centimeters long. Astragalus oophorus is a perennial herb with a stout, mostly hairless stem reaching up to about 30 centimeters in length. Leaves are up to 15 centimeters long and are made up of many oval to rounded leaflets. The inflorescence is an array of 4 to 10 flowers each up to 2 or 2. 5 centimeters long. The flowers are cream-colored or reddish purple with white tips. The fruit is an inflated legume pod, oval in shape and bladder-like, reaching 2 to over 5 centimeters long. Varieties: There are several varieties of Astragalus oophorus, including:A. o. var. caulescens - native to the western US from Nevada to ColoradoA. o. var. clokeyanus - endemic to NevadaA. o. var. lavinii (Lavin's milkvetch) - native to Nevada and known from California
Plant Description
Plant Type
Perennial herb

Max. Height
4 - 11.8 in (10.2 - 30 cm)

Flower Color
Cream

Native Status
Native

Natural Setting
Elevation ?
2173' - 10803'

Annual Precip. ?
6.1" - 22.4"

Summer Precip. ?
0.25" - 4.39"

Coldest Month ?
22.4° F - 51.7° F

Hottest Month ?
45.9° F - 74.6° F

Humidity ?
1.85 vpd - 25.60 vpd

Landscaping Information
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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