Amelanchier utahensis
Amelanchier sanguinea
pale leaf serviceberry, pale serviceberry, Utah service-berry, Utah serviceberry or shadbush
amélanchier sanguin, red-twigged shadbush, round-leaf serviceberry, round-leaf shadbush, shore shadbush
mostly or fully unfolded;
petiole (3–)6–13(–22) mm;
blade suborbiculate to oval or obovate, (14–)21–36(–63) × (9–)16–32(–54) mm, base usually rounded to subcordate, sometimes cuneate, each margin with 0–3(–6) teeth on proximal 1/2 and (0–)3–5(–7) teeth in distalmost cm, largest teeth more than 1 mm, apex usually rounded to truncate or emarginate, sometimes acute and mucronate, abaxial surface moderately (sparsely or densely) hairy by flowering, sparsely to moderately hairy later, adaxial glabrous or sparsely (moderately) hairy later.
fully unfolded or nearly so;
petiole (8–)11.3–18.1(–25) mm;
blade elliptic-oblong to suborbiculate or obovate, (27–)38–59(–78) × (19–)26–43(–55) mm, base rounded to subcordate, each margin with (0–)4–11(–16) teeth on proximal 1/2 and (0–)3–6(–8) teeth in distalmost cm, largest teeth more than 1 mm, apex rounded and mucronate to subacute, abaxial surface densely (sparsely) hairy by flowering, surfaces sparsely (moderately) hairy (or glabrous) later.
(4–)6–10(–13)-flowered, (8–)16–30(–43) mm.
(4–)7–10(–13)-flowered, (20–)30–51(–68) mm.
(0 or)1 or 2(or 3) subtended by a leaf, proximalmost (2–)7–16(–25) mm.
0–2 subtended by a leaf, proximalmost (8–)11–23(–36) mm.
sepals usually recurved after flowering, (1.6–)2.6–4.2(–6.5) mm;
petals oblanceolate to oblong, (4.9–)7.2–9.8(–14) × (1.6–)2.6–3.1(–5.3) mm;
stamens (9–)13–19(–20);
styles (2 or)3 or 4, (1.7–)2.3–3(–3.9) mm;
ovary apex moderately to densely hairy (or glabrous).
sepals recurved or spreading after flowering, (1.8–)2.5–4.1(–6) mm;
petals linear to narrowly spatulate, (8–)10.7–16.1(–20) × (2–)3.5–5.6(–7) mm;
stamens (16–)19–21(–24);
styles (4 or)5, (1.6–)2.5–3.4(–4.6) mm;
ovary apex densely (moderately) hairy.
purplish black, 6–10 mm diam. 2n = 4x.
dark purple or almost black, 10 mm diam. 2n = 2x, 3x, 4x.
Amelanchier utahensis
Amelanchier sanguinea
The sparsely to moderately hairy mature leaves and twigs, rounded to truncate or emarginate leaf apices, relatively short petals, and reduced numbers of stamens and styles are distinctive characteristics for the wide-ranging and common Amelanchier utahensis. Within 25 years of its publication, about a dozen names were published that G. N. Jones (1946) considered synonyms of A. utahensis. Some recent floras have recognized some of these synonymized taxa, including A. bakeri Greene, A. covillei, A. mormonica C. K. Schneider, A. oreophila A. Nelson, and A. venulosa Greene.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
This treatment follows G. N. Jones’s (1946) and E. G. Voss’s (1972–1996, vol. 2) with the inclusion of Amelanchier huronensis in A. sanguinea. The former was considered to differ from A. sanguinea in having longer proximalmost pedicels, sepals, and petals, but overlap occurs in the ranges of these characters. Moreover, A. sanguinea has been seen far from the range of A. huronensis (southern Ontario, Michigan, Minnesota, and Wisconsin) with petals as long as the longest reported for A. huronensis. Occurrences of A. sanguinea in Kentucky and North Dakota are questionable, as no specimens were actually seen to confirm the presence of this species from these states.
Amelanchier sanguinea has shorter petals than A. amabilis. Amelanchier humilis differs from A. amabilis and A. sanguinea in having shorter proximalmost pedicels, erect inflorescences, and shorter petals. Amelanchier amabilis, A. sanguinea, and, to a lesser extent, A. humilis resemble western North American congeners.
Amelanchier sanguinea flowers 10 to 14 days after A. arborea and A. laevis, according to K. M. Wiegand (1912), and at the same time as A. amabilis. Hybrids between A. sanguinea and A. bartramiana, A. canadensis, A. laevis, and A. spicata have been reported (M. L. Fernald 1950; P. Landry 1975). The authors have observed A. sanguinea flowering with A. amabilis but no putative hybrids were observed.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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