Astragalus species

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Scientific Name Astragalus agrestis USDA PLANTS Symbol
ASAG2
Common Name Field Milkvetch, Purple Milkvetch ITIS Taxonomic Serial No.
25405
Family Fabaceae (Pea) Burke Museum of
Natural History Ref.
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Description Life zones and habitat: Foothills to montane; moist meadows, forests, along streams.
Plant: Perennial with numerous slender creeping to erect stems, 5 to 12 inches long.
Leaves: Alternate compound leaves, 2 to 4 inches long, each with 11 to 19 oblong leaflets 3/8 to 3/4-inch long.
Inflorescence: Raceme up to 1 inch across and long of 7 to 20 erect pea-like flowers on short peduncle; each flower less than 3/4-inch long with blue to purple and white petals; calyx (sepals) beneath with grey or black hairs.
References: Descr. adapted from www.montanaplantlife.org
Colorado Status
Native
Scientific Name Astragalus alpinus var. alpinus USDA PLANTS Symbol
ASALA4
Common Name Alpine Milkvetch ITIS Taxonomic Serial No.
192322
Family Fabaceae (Pea) Encyclopedia of Life Reference
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Description Life zones and habitat: Montane to alpine; often in moist areas (woodlands, meadows, around streams and lakes) and on tundra, cold, dry, exposed areas.
Plant: Mat-forming perennial with weak, slender, hairy stems up to 12 inches long.
Leaves: Basal leaves 2 to 8 inches long, pinnately-dissected into 3/8-inch long oval, hairy leaflets.
Inflorescence: Small racemes on long peduncles 3/4 to 1-1/2 inches long, with several nodding pea-like flowers with white/purple petals; each blossom about 1/2-inch long; united sepals beneath with small black hairs.
References: Descr. adapted from "Guide to Colorado Wildflowers" by G.K. Guennel and Encyclopedia of Life and SEINet.
Colorado Status
Native
Scientific Name Astragalus hallii USDA PLANTS Symbol
ASHA2
Common Name Hall's Milkvetch ITIS Taxonomic Serial No.
25531
Family Fabaceae (Pea) SEINet
Reference
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Description Life zones and habitat: Foothills to subalpine; rocky slopes, woodlands.
Plant: Creeping perennial with numerous slender stems up to 2 feet long.
Leaves: Compound leaves up to 4 inches long, each with at least 10 small oblong leaflets with rounded tips nearly folded in half.
Inflorescence: Small racemes purple-to-lavender/white pea-like flowers; calyx (sepals) beneath reddish to purple with grey or black hairs.
References: Descr. adapted from www.americansouthwest.net and Wildflowers of Peak 7
Colorado Status
Native
Scientific Name Astragalus shortianus USDA PLANTS Symbol
ASSH3
Common Name Short's Milkvetch ITIS Taxonomic Serial No.
25678
Family Fabaceae (Pea) Encyclopedia of Life Reference
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Description Life zones and habitat: Plains and foothills; Dry, gravelly areas, shrublands.
Plant: Short perennial up to 6 inches tall; inflorence supported on peduncles rather than stems.
Leaves: Pinnately-divided compound leaves with many (10 or more) obovate leaflets 1/4 to 3/4-inch long, densely covered with silver hairs.
Inflorescence: Small racemes of purple pea-like flowers in a hairy cluster on peduncles 1 to 6 inches long.
References: Descr. adapted from www.easterncoloradowildflowers.com and Montana Field Guides
Colorado Status
Native


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© Tom Lebsack 2017