familyFabaceae
subfamilyFabaceae subfam. Faboideae
genusAstragalus
sectionAstragalus sect. Villosi
speciesAstragalus distortus
Astragalus distortus var. engelmannii
Rev. N.-Amer. Astragalus, 256. 1923. (as engelmanni)
Common names: Engelmann’s milkvetch
Endemic
Basionym: Astragalus engelmannii E. Sheldon Minnesota Bot. Stud. 1: 152. 1894
Treatment appears in FNA Volume 11.
Flowers 8.2–11.6(–12) mm; calyx tube (2–)2.4–3.4 mm, lobes 0.7–1.5(–1.8) mm. Legumes 13–20 × 3.5–5.5(–6) mm, sutures shallowly sulcate dorsally, not or obscurely so ventrally, cross section obcordate or subglobose. 2n = 26.
Phenology: Flowering Feb–May.
Habitat: Prairie relicts, open woodlands, old fields or pastures, on limestone, slate, or clay substrates, in pine or oak woodlands.
Elevation: 0–300 m.
Distribution
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Ark., La., Miss., Tex.
Discussion
Variety engelmannii is known from northeastern Texas as far south as Matagorda County and adjacent northwestern Louisiana and southwestern Arkansas, with a population in Forrest County in southern Mississippi.
Selected References
None.
Lower Taxa
None.
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