Acmispon decumbens var. davidsonii
Skvortsovia 4(3): 76. 2018.
Leaves: rachis (1–)2–5 mm. Inflorescences (1–)3–5(–8)-flowered. Flowers 4.5–8(–9) mm; calyx 6–7 mm, lobes 0.5–1.5(–2) mm; corolla appearing blocky, banner 4.5–6.5 mm, abruptly upcurved ± 90°, usually drying dark. Legumes usually 2–2.2 mm wide.
Phenology: Flowering late spring–summer.
Habitat: Pine forests, oak groves, open rocky slopes of Douglas-fir-oak forests, open dry slopes and flats, summits, wet places.
Elevation: 1200–2800 m.
Discussion
Variety davidsonii is known from the Transverse and northeastern Peninsular ranges. A. M. Ottley (1923) considered var. davidsonii as intermediate between Lotus douglasii var. nevadensis (Acmispon decumbens var. decumbens) and L. argophyllus var. decorus (A. argophyllus var. argophyllus). Intermediates with var. decumbens may occur. Hosackia sulphurea Abrams (1944) and Syrmatium sulphureum Brand (1898) are illegitimate names (superfluous for Lotus davidsonii 1893) that pertain here.
Selected References
None.