familyFabaceae
subfamilyFabaceae subfam. Faboideae
genusAstragalus
sectionAstragalus sect. Collini
speciesAstragalus curvicarpus
Astragalus curvicarpus var. brachycodon
Amer. Midl. Naturalist 55: 487. 1956.
Common names: Deschutes milkvetch
Endemic
Basionym: Astragalus whitedii var. brachycodon Barneby Amer. Midl. Naturalist 41: 496. 1949
Treatment appears in FNA Volume 11.
Plants strigulose. Stems 20–40 cm. Leaflets: adaxial blade surface pubescent. Flowers 13.6–15(–16.8) mm; calyx 6.1–8.5(–9.3) mm, tube 5.4–7.6(–8.6) mm, deeply campanulate or cylindric, lobes 0.4–1 mm. Legumes lunately incurved or hamate, 14–22 × 3.4–4.5 mm, glabrous; stipe 6–12(–15) mm. Seeds 15–21.
Phenology: Flowering May–Jul.
Habitat: Plains and hillsides on rough basaltic gravel or pumice sand.
Elevation: 800–1200 m.
Distribution
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Oreg.
Discussion
Variety brachycodon is known from the upper Deschutes River drainage in Crook, Deschutes, and Jefferson counties.
In some plants of var. brachycodon, the calyx is usually obscurely saccate, sometimes merely truncate; the pedicel then is attached at a right angle to the lower corner.
Selected References
None.
Lower Taxa
None.