Astragalus panamintensis
Contr. U.S. Natl. Herb. 4: 87. 1893.
Plants 5–18 cm, silvery-canescent; from branched caudex, branches intricate, usually with sparse thatch of marcescent petioles. Stems erect or ascending, internodes elongate or not, usually white-strigulose. Leaves (1.5–)2–12 cm; stipules 1–3(–4) mm, herbaceous becoming papery; leaflet blades linear-elliptic or subulate, 2–12(–14) mm, apex acute and apiculate, surfaces silvery-canescent. Peduncles ascending, (0.5–)1–6(–8) cm. Racemes 1–4(–6)-flowered; axis (0–)1.5–3.5 cm in fruit; bracts 0.8–2 mm; bracteoles 0. Pedicels 1–2.5 mm. Flowers 8.2–14 mm; calyx 4.6–8.5 mm, strigulose, tube (2.7–)3–4.6 mm, lobes lanceolate- to linear-subulate, 1.5–4.4 mm; corolla pink-purple, banner with white in middle, wing tips white, keel maculate; keel 6.6–8.7 mm. Legumes pale green and purple spotted becoming stramineous, slightly decurved or ± straight, bluntly 3-sided compressed, 8–18 × (2.3–)3.4–4.7 mm, thin becoming papery, densely strigulose.
Phenology: Flowering Apr–Jun.
Habitat: Forming mats on ledges and crevices in limestone outcrops and talus, less commonly in canyon bottoms.
Elevation: (1000–)1200–2200 m.
Distribution
Calif.
Discussion
Astragalus panamintensis is restricted to the mountains of Inyo County. The leaflets appear to be early deciduous, falling more or less synchronously with the fruits.
Selected References
None.