Astragalus nutriosensis
Madroño 35: 325, fig. 1. 1989.
Plants dwarf, clump-forming, acaulescent, 3–11 cm, pilose to strigulose. Stems obsolete. Leaves 3–11 cm; stipules 3–9 mm; leaflets 11–19, blades obovate or elliptic, 4–8 mm, apex acute or obtuse, surfaces hairy abaxially, glabrescent adaxially. Peduncles (0–)1–2(–5) cm. Racemes (1 or)2–5(–7)-flowered; axis to 0.6 cm in fruit; bracts 2–5 mm; bracteoles 0. Pedicels 2–4 mm. Flowers 20–23 mm; calyx cylindric, 11–14 mm, pilose; corolla white to lavender-pink or veined pink-purple, keel tip lavender-pink. Legumes ascending, brownish gray, ± straight, semi-ellipsoid, subterete to slightly obcompressed, 8–10 × 6–8 mm, thin and papery, pilose. Seeds 20.
Phenology: Flowering May–Jun.
Habitat: Volcanic silt-clay soils on gently sloping hillsides, with juniper, blue grama and matchweed.
Elevation: 2200–2400 m.
Discussion
Astragalus nutriosensis is known from the border region between Arizona and New Mexico in Apache and Catron counties, respectively. It is still relatively poorly known and may ultimately be placed outside sect. Mollissimi.
Selected References
None.