7b. Prunus virginiana Linnaeus var. demissa (Nuttall) Torrey in C. Wilkes et al., U.S. Expl. Exped. 17: 284. 1874.
Western chokecherry
Cerasus demissa Nuttall in J. Torrey and A. Gray, Fl. N. Amer. 1: 411. 1840; C. demissa var. melanocarpa A. Nelson; Prunus demissa (Nuttall) D. Dietrich; P. demissa var. melanocarpa (A. Nelson) A. Nelson; P. melanocarpa (A. Nelson) Rydberg; P. virginiana subsp. demissa (Nuttall) Roy L. Taylor & MacBryde; P. virginiana subsp. melanocarpa (A. Nelson) Roy L. Taylor & MacBryde; P. virginiana var. melanocarpa (A. Nelson) Sargent
Leaves: blade elliptic to oblanceolate, lengths of larger at least 2 times widths. Inflorescences: racemes (30–)60–110(–130) mm. Flowers: hypanthium 2–3 mm; sepals 0.7–1.4 mm; petals 4–5(–7) mm. 2n = 16.
Flowering Apr–Jun; fruiting Jul–Sep. Canyons, gullies, mountain slopes, stream banks and terraces, chaparral, pine-oak forests, thickets, grassy rocky slopes, bluffs, forest edges, roadsides; 30–3000 m; Alta., B.C.; Ariz., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Tex., Utah, Wash., Wyo.; Mexico (Chihuahua, Sonora).
