Amelanchier alnifolia var. semiintegrifolia
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 3: 94. 1961.
Shrubs or trees, 1–12 m. Stems 1–20, solitary or in colonies. Leaves: petiole (3–) 6.8–12.6 (–20) mm; blade elliptic to oval to orbiculate, (16–) 24–34 (–49) × (7–) 17–26 (–37) mm, base rounded or subcordate, apex subtruncate to rounded or acute, abaxial surface sparsely to moderately hairy, adaxial glabrous or sparsely (moderately) hairy. Inflorescences (4–) 6–9 (–12) -flowered, (8–) 14–26 (–35) mm. Pedicels: proximalmost (2–) 3–8 (–13) mm. Flowers: sepals (1.4–) 2.2–3.2 (–4) mm; petals oblanceolate to oval, (7.6–) 9.9–13.9 (–18.2) × (2.6–) 3.3–4.7 (–6.6) mm; ovary apex moderately to densely hairy (or glabrous). Pomes 10–13 mm diam. 2n = 4x.
Phenology: Flowering Mar–Jun; fruiting Jun–Aug.
Habitat: Woods, hillsides, roadsides, mountainsides
Elevation: 0–2100 m
Distribution
B.C., Alaska, Calif., Oreg., Wash.
Discussion
Variety semiintegrifolia is most similar to and intergrades with var. alnifolia; inflorescences and lowest pedicel lengths distinguish the two.
Selected References
None.