Astragalus kentrophyta

(Spiny Milkvetch)

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7566

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7569

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7563

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7561

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7558

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Astragalus kentrophyta, Pawnee Buttes, Weld Co. 7573

Scientific Name Astragalus kentrophyta USDA PLANTS Symbol ASKE
Common Name Spiny Milkvetch ITIS Taxonomic Serial No. 25553
Family Fabaceae (Pea) SEINet
Reference
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Description Life zones and habitat: Plains to subalpine (4000 to 10800 ft.); sandy or rocky soils in open areas.
Plant: Low-growing perennial with prostrate stems a few inches high forming mats up to 16 inches across.
Leaves: Odd pinnately-compound leaves, each with 3 to 7 spine-tipped linear-elliptic or linear-oblanceolate leaflets up to 2/3-inch long; surfaces flat or curled inward with appressed or dolabriform (axe-shaped) hairs.
Inflorescence: Short racemes in the leaf axils, each with 1 to 3 small pea-like flowers barely rising above the leaflets; white to yellowish-white or pink-purplish corolla and banner 1/4 to 1/2-inch long; calyx ~1/4-inch long and pubescent-hairy.
Bloom Period: May to August.
Fruit: Small compressed-ovoid pods less than 1/3-inch long, green, becoming straw colored.
Reference: "Flora of Colorado" by Jennifer Ackerfield, American Southwest, Montana Field Guide and SEINet.
BONAP Distribution Map


Map Color Key
Colorado Status:
Native

© Tom Lebsack 2022

Banner photo: Ten Mile Range and Rhodiola integrifolia (King’s Crown) in Summit County