Family: Brassicaceae
[Draba asprella var. typica C.L. Hitchc.]
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Fruit valves hirsute, trichomes simple and unequally 2-rayed, (0.2-)0.3-1 mm. 2n = 30.
Flowering Mar-May. Rocky igneous soil in pine-oak woodlands; 1500-2500 m; Ariz.
Variety asprella is known only from Coconino and Yavapai counties in central Arizona.