Astragalus pattersonii

(Patterson Milkvetch)

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Astragalus pattersonii, Dotsero, Eagle Co. 0038

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Astragalus pattersonii, Dotsero, Eagle Co. 0021

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Astragalus pattersonii, Dotsero, Eagle Co. 0028

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Astragalus pattersonii, Dotsero, Eagle Co. 0030

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Astragalus pattersonii, Dotsero, Eagle Co. 0044

Scientific Name Astragalus pattersonii USDA PLANTS Symbol ASPA14
Common Name Patterson Milkvetch ITIS Taxonomic Serial No. 25625
Family Fabaceae (Pea) SEINet
Reference
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Description Life zones and habitat: Semi-desert to foothills (5000 to 8500 ft); dry clay or shaley soils on hillsides, flats.
Plant: Erect clump-forming perennial, 9 to 28 inches high; arching red stems.
Leaves: Pinnately-compound leaves with up to 13 pairs of deep green elliptic to oblong leaflets 0.2 to 1.2 inches long, with pointed tips and smooth upper surfaces, somewhat hairy beneath.
Inflorescence: Clusters of white pea-like flowers in a compact raceme; calyx tubes with conspicuous fringe-like lobes and tiny black hairs; blossoms becoming yellowish with age.
Bloom Period: May to July.
Fruit: Smooth, green or brownish pods, ellipsoid shape 5/8 to 1 inch long, pointed tips.
Reference: "Flora of Colorado" by Jennifer Ackerfield and SW Colorado Wildflowers.
BONAP Distribution Map

Colorado Status:
Native

© Tom Lebsack 2022

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