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Astragalus pseudiodanthus
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Tonopah Milkvetch
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Astragalus pseudiodanthus

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About Tonopah Milkvetch (Astragalus pseudiodanthus) Astragalus pseudiodanthus is a species of milkvetch known by the common name Tonopah milkvetch. It is native to the Great Basin deserts of Nevada and eastern California, such as the Tonopah area, where it grows in sandy habitat. This plant is named for the very similar Astragalus iodanthus, of which it is sometimes treated as a variety. This is a small mat-forming perennial herb extending several stems from a stem base which lies beneath the surface of the sand. The leaves are up to 5 centimeters long and are made up of small crowded leaflets. The inflorescence is a cluster of reddish purple flowers. The fruit is a legume pod up to about 2. 5 centimeters long. It is fleshy when new and dries to a leathery texture.
Plant Description
Plant Type
Perennial herb

Max. Height
7.9 - 11.8 in (20.1 - 30 cm)

Flower Color
Purple, Red

Native Status
Natural Setting
Elevation ?
6712' - 6821'

Annual Precip. ?
9.9" - 11.0"

Summer Precip. ?
1.39" - 1.51"

Coldest Month ?
30.6° F - 31.0° F

Hottest Month ?
61.6° F - 62.0° F

Humidity ?
1.91 vpd - 18.37 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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