Astragalus barnebyi
Great Basin Naturalist 35: 346. 1976. (as barneby)
Plants acaulescent or subacaulescent, 1.5–5 cm, strigulose, hairs basifixed; from branched caudex. Stems prostrate, when developed, 0–5 cm, mostly obscured by stipules, strigulose. Leaves 1.5–5 cm; stipules connate-sheathing or distinct, 2–7 mm, membranous; leaflets 7–17, blades elliptic to oblanceolate, 3–9 mm, apex acute to obtuse, surfaces strigose. Peduncles ascending, 0.5–5.2 cm. Racemes 2–8-flowered, flowers ascending; axis 0.5–2.5 cm in fruit; bracts 2–4 mm; bracteoles 0–2. Pedicels 0.5–1.5 mm. Flowers 12.2–15 mm; calyx short-cylindric, 6.1–7.7(–8.4) mm, pilose, hairs black and white, tube 5.2–6.5 mm, lobes subulate, 0.9–1.7 mm; corolla pink-purple or bicolored; keel 9.8–12.5 mm. Legumes declined, green, usually red-mottled or -spotted, becoming stramineous, lunately incurved, ovoid-ellipsoid, dorsiventrally compressed, 12–19 × 5–6 mm, subunilocular, thin becoming papery, long silky-pilose; sessile, gynophore 0–0.5+ mm. Seeds 20.
Phenology: Flowering Apr–Jun.
Habitat: Pinyon-juniper woods and mixed desert shrublands on platy shales of the Carmel Formation, on sandstone of Jurassic and Cretaceous ages.
Elevation: 1400–1900 m.
Discussion
Astragalus barnebyi is known in northern and northeastern Arizona to south-central Utah.
Selected References
None.