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Astragalus species [Fabaceae]

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Scientific Name Astragalus gracilis USDA PLANTS Symbol ASGR3
Common Name Slender Milkvetch ITIS Taxonomic Serial No. 25528
Family Fabaceae (Pea) SEINet
Reference
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Description Habitat: Often calcareous soils on open prairie hilltops, wooded or brushy hillsides, ravines, and roadsides.
Plant: Erect, ascending, or decumbent, 1 or more branched weak stems 6 to 32 inches long; stems covered with fine, short, appressed hairs.
Leaves: Odd-pinnately-compound leaves 3/4 to 2-3/4 inches long with each blade divided into 9 to 17 narrowly-linear or linear-oblong widely separated leaflets, 1/4 to 3/4-inch long, less than 1/10 inch wide up to 3/8-inch long; upward-curled edges.
Inflorescence: Loose spike-like racemes 2 to 8 inches long with 3 to 50 pea-like blossoms; corollas dark purple to pale pinkish or sometimes whitish with purple keel tips, fading to yellowish; banner often purple-veined.
Bloom Period: April to July.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston and Kansas Wildflowers and Grasses.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Astragalus leptocarpus USDA PLANTS Symbol ASLE10
Common Name Rare Loco Milkvetch, Slimpod Milkvetch ITIS Taxonomic Serial No. 25561
Family Fabaceae (Pea) SEINet
Reference
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Description Habitat: Sandy or calcareous clay soils in open post oak woodlands, mesquite thickets, sandy fallow fields and roadsides up to 1000 ft.
Plant: Low, delicate annual, weakly erect, ascending or decumbent; hairy stems 6 to 14 inches long.
Leaves: Pinnately-compound leaves up to 2-3/4 inches long with each blade divided into 11 to 17 green, flat, smooth oblong or obovate leaflets up to 3/8-inch long.
Inflorescence: Short, roundish terminal racemes with 2 to 7 pea-like flowers 1/2-inch across; magenta to bluish-purple petals, banner and laterals with large white portions toward the center of the blossom.
Bloom Period: April.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Shinners & Mahler’s Flora of North Central Texas" by Diggs, Lipscomb and O’Kennon, and Steere Herbarium.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Astragalus missouriensis USDA PLANTS Symbol ASMI10
Common Name Missouri Milkvetch ITIS Taxonomic Serial No. 25585
Family Fabaceae (Pea) SEINet
Reference
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Description Habitat: Dry, sandy areas in prairies, meadows and roadsides.
Plant: Prostrate perennial with few to several hairy stems 1/2 to 6 inches long.
Leaves: Pinnately-compound leaves 1-5/8 to 5-1/2 inches long with each blade divided into 11 to 17 individual elliptic to narrowly obovate leaflets 1/4 to 3/4-inch long usually with pointed tips and densely-covered with appressed hairs on both surfaces giving a gray-green appearance.
Inflorescence: Short racemes on 1½ to 4-inch stems with 3 to 10 typical pea-like flowers; each flower with a broad upright banner, lavender to bright purple with white center and 1/2-inch or more long; two smaller lavender to bright purple lateral petals and keel; calyx up to 1/2-inch long and covered with appressed hairs, lobes pointed.
Bloom Period: March to June.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, Kansas Wildflowers and Grasses and www.americansouthwest.net.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Astragalus nuttallianus var. austrinus USDA PLANTS Symbol ASNUA
Common Name Smallflowered Milkvetch, Rio Fronteras Milkvetch ITIS Taxonomic Serial No. 192665
Family Fabaceae (Pea) SEINet
Reference
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Description Habitat: Sandy or gravelly soils on slopes, streambeds, washes; western 2/3 of Texas, east to North Central Texas and south to Rio Grande.
Plant: Low-growing, creeping annual 1 to 2 inches tall; hairy green stems, becoming reddish, 4 to 20 inches long.
Leaves: Pinnately-compound leaves 1 to 2 inches long overall, each with 5 to 17 small, hairy, elliptical or oblong leaflets less than 1/2-inch long, tips pointer or rounded, not notched.
Inflorescence: A few typical but tiny pea-like blossoms in a short terminal raceme, each less than 1/4-inch across; petals blue-to-purple with white center.
Bloom Period: February to May.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of the Texas Hill Country" by Marshall Enquist, www.americansouthwest.net.
BONAP Distribution Map

Texas Status:
Native
Scientific Name Astragalus nuttallianus var. nuttallianus USDA PLANTS Symbol ASNUN
Common Name Smallflowered Milkvetch, Turkey-pea ITIS Taxonomic Serial No. 192671
Family Fabaceae (Pea) SEINet
Reference
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Description Habitat: Roadsides and colonies in North Central Texas and eastern part of Plains, south to Edwards Plateau and Rio Grande.
Plant: Low-growing, creeping annual 1 to 2 inches tall; hairy green stems, becoming reddish, up to 12 inches long.
Leaves: Pinnately-compound leaves about 1 inch long overall with 6 pairs of tiny, hairy leaflets 0.3 inch long, elliptic to obovate with a notched tip.
Inflorescence: A few typical but tiny pea-like blossoms in a short terminal raceme, each less than 1/4-inch across; petals blue-to-purple with white center.
Bloom Period: February to May.
References: "Manual of the Vascular Plants of Texas" by Correll and Johnston, "Wildflowers of the Texas Hill Country" by Marshall Enquist, "Vascular Plants of Williamson County" by A.C. Gibson abd www.americansouthwest.net.
BONAP Distribution Map

Texas Status:
Native

© Tom Lebsack 2021