Oxytropis nigrescens subsp. pygmaea (Pallas) Hultén
Oxytropis nigrescens subsp. pygmaea (Pallas) Hultén is a synonym sensu FNA Ed. Comm., 2023b of:
Oxytropis nigrescens (Pallas) Fischer var. nigrescens, an accepted variety name sensu FNA Ed. Comm., 2023b.