Astragalus knightii
Brittonia 35: 109, fig. 1. 1983.
Plants delicate, 10–15 cm, strigulose, hairs gray, malpighian, slight so, or basifixed; caudex branched. Stems slender, decumbent to incurved-ascending, strigulose. Leaves (2–)2.5–8.5 cm; stipules: proximals connate-sheathing, bidentate scarious at proximal nodes, distinct or connate at base and subherbaceous at distal nodes, 2–5 mm; leaflets 9–15, blades elliptic to ovate-elliptic, 2–8 mm, apex obtuse or subapiculate, surfaces strigulose. Peduncles ascending to declined, 2–5.5 cm. Racemes 5–10(–14)-flowered; axis (1–)1.5–4 cm in fruit; bracts 0.7–1.2 mm; bracteoles 0. Flowers 5–6 mm; calyx 3.3–4 mm, strigose, hairs white or black, tube 2.1–2.7 mm, lobes subulate, 1–1.4 mm. Legumes pendulous (or humistrate), red-mottled, narrowly obovoid-ellipsoid, slightly dorsiventrally compressed, 8–14 × 4–6 mm, thin becoming papery-membranous, strigulose; gynophore 0.5–1 mm. Seeds 12–14(–16).
Phenology: Flowering May–Jun.
Habitat: Ledges and sand-pockets of cliff terraces and rimrock in juniper savannas and grasslands.
Elevation: 1700–1800 m.
Discussion
Astragalus knightii is restricted to Sandoval County.
Selected References
None.