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Astragalus kentrophyta
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Spiny Milkvetch
( Astragalus kentrophyta )
Astragalus kentrophyta
More Photos at CalPhotos
More Info at Jepson eFlora
Calflora
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About Spiny Milkvetch (Astragalus kentrophyta)
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Astragalus kentrophyta
is a species of milkvetch known by the common name spiny milkvetch. It is native to western North America from central to west Canada, to California, to New Mexico. It grows in rocky mountainous areas, such as the Sierra Nevada, and on plateaus. This perennial herb is somewhat variable in appearance, especially across Varieties: It is generally small and low-lying, growing in spiny mats or clumps. The short stems are hairy. The small leaves are made up of smaller oval-shaped or narrow linear, spine-tipped leaflets. The inflorescence bears one to three white to pinkish purple flowers, each less than a centimeter long. The fruit is a hairy, flattened legume pod 4 to 9 millimeters in length. Varieties: There are several varieties of
Astragalus kentrophyta
species, including:A. k. var. coloradoensis (Colorado spiny milkvetch) - limited to Utah and ArizonaA. k. var. danaus (Sweetwater Mountains milkvetch) - endemic to eastern CaliforniaA. k. var. douglasii (Douglas' spiny milkvetch, thistle milkvetch) - limited to Oregon and Washington but possibly extirpated from the latterA. k. var. elatus (tall spiny milkvetch, spiny-leaved) - found throughout the western United StatesA. k. var. neomexicanus (New Mexico spiny milkvetch) - endemic to New MexicoA. k. var. tegetarius (mat milkvetch) - distributed throughout the western USA. k. var. ungulatus - endemic to Nevada
Plant Description
Plant Type
Perennial herb
Size
11.8 in tall
Flower Color
Pink, White, Purple
Wildlife Supported
Butterflies & moths hosted ( 21
likely
* )
SHOW ALL
*
Painted Lady
Vanessa cardui
Vanessa cardui
*
Acmon Blue
Icaricia acmon
Icaricia acmon
*
Orange Sulphur
Colias eurytheme
Colias eurytheme
*
Silvery Blue
Glaucopsyche lygdamus
Glaucopsyche lygdamus
*
Shasta Blue
Icaricia shasta
Icaricia shasta
*
Silver-Spotted Skipper
Epargyreus clarus
Epargyreus clarus
*
Melissa Blue
Plebejus melissa
Plebejus melissa
Landscaping Information
Natural Setting
Climate
Annual Precipitation: 10.2" - 60.2", Summer Precipitation: 0.87" - 2.82", Coldest Month: 19.2" - 46.2", Hottest Month: 37.6" - 69.3", Humidity: 1.40" - 17.39", Elevation: 7093" - 13363"
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Spiny Milkvetch
Astragalus kentrophyta
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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