Common names: Lovely shadbush amélanchier gracieux
Endemic
Basionym: Amelanchier sanguinea (Pursh) de Candolle forma grandiflora Wiegand Rhodora 14: 139. 1912,
Synonyms: A. sanguinea var. grandiflora (Wiegand) Rehder
Treatment appears in FNA Volume 9. Treatment on page 654. Mentioned on page 649, 653, 656, 661.

Shrubs, 1–5 m. Stems 1–20, forming colonies. Leaves fully unfolded; petiole (9–) 12.1–19.9 (–28) mm; blade ovate-oval, (33–) 41–58 (–72) × (24–) 30–46 (–57) mm, base rounded to subcordate, each margin with (2–) 6–10 (–15) teeth on proximal 1/2 and (1 or) 3 or 4 (or 5) teeth in distalmost cm, largest teeth more than 1 mm, apex subacute, abaxial surface densely (moderately) hairy by flowering, sparsely (moderately) hairy (or glabrous) later, adaxial sparsely hairy (or glabrous) later. Inflorescences (4 or) 5–8 (–11) -flowered, (26–) 38–57 (–75) mm. Pedicels: (0 or) 1 or 2 (or 3) subtended by a leaf, proximalmost (9–) 18–26 (–33) mm. Flowers: sepals spreading to recurved after flowering, (2.4–) 3.5–4.9 (–6.5) mm; petals linear to narrowly spatulate, (15–) 16.6–19.7 (–22) × (4–) 5.3–7.3 (–8.6) mm; stamens (17–) 19–21 (–23); styles (3–) 5, (2.3–) 2.8–3.6 (–4.2) mm; ovary apex densely hairy. Pomes dark purple or almost black, 10 mm diam. 2n = 4x.


Phenology: Flowering May–Jun; fruiting Jul–Aug.
Habitat: Open woods, rocky banks, shores, calcareous sites
Elevation: 0–300 m

Discussion

Amelanchier amabilis makes a conspicuous display with its relatively large flowers; in eastern North America, it resembles most closely A. sanguinea. Leaves with three or four teeth on distal cm of margin and largest teeth more than 1 mm are also useful for identification.

Amelanchier amabilis flowers at the same time as A. humilis and A. sanguinea. The authors have observed A. amabilis growing with A. sanguinea without the occurrence of putative hybrids; putative hybrids with A. arborea and A. humilis have been observed in the field.

Selected References

None.

Lower Taxa

None.
... more about "Amelanchier amabilis"
1 cm10 mm <br />0.01 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
glabrous +  and hairy +
Christopher S. Campbell +, Michael B. Burgess +, Kevin R. Cushman +, Eric T. Doucette +, Alison C. Dibble +  and Christopher T. Frye +
Wiegand +
fissuring in older trees +  and smooth +
salmon colored +, brown +  and gray +
compound +  and simple +
opposite +  and alternate +
rounded +  and subcordate +
Amelanchier sanguinea +
5.8 cm58 mm <br />0.058 m <br /> (7.2 cm72 mm <br />0.072 m <br />) +
4.6 cm46 mm <br />0.046 m <br /> (5.7 cm57 mm <br />0.057 m <br />) +
4.1 cm41 mm <br />0.041 m <br /> (5.8 cm58 mm <br />0.058 m <br />) +
ovate-oval +
30mm +  and 46mm +
adnate +  and connate +
Lovely shadbush +  and amélanchier gracieux +
Ont. +, Que. +  and N.Y. +
not +  and aggregated +
0–300 m +
unisexual +  and bisexual +
not +  and aggregated +
not +  and aggregated +
purplish +  and nearly black pinkish or maroon-purple dark purple-blue or brownish +
0.6 cm6 mm <br />0.006 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Open woods, rocky banks, shores, calcareous sites +
glabrous +  and hairy +
5-8(-11)-flowered +
5.7 cm57 mm <br />0.057 m <br /> (7.5 cm75 mm <br />0.075 m <br />) +
nodding +, spreading +, drooping +, erect +, ascending +  and arching +
3.8 cm38 mm <br />0.038 m <br /> (5.7 cm57 mm <br />0.057 m <br />) +
crassinucellate +
deciduous +
pinnate +, dentate +, serrate +  and entire +
toothed +, unlobed +  and lobed +
6-10-loculed +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and basal +
2 +  and 1 +
1 cm10 mm <br />0.01 m <br /> (5.5 cm55 mm <br />0.055 m <br />) +
1.97 cm19.7 mm <br />0.0197 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0 (?) +  and 4 (?) +
0.73 cm7.3 mm <br />0.0073 m <br /> (0.86 cm8.6 mm <br />0.0086 m <br />) +
Pink (?) +, Ivory (?) +  and White (?) +
free +  and distinct +
1.66 cm16.6 mm <br />0.0166 m <br /> (1.97 cm19.7 mm <br />0.0197 m <br />) +
0.53 cm5.3 mm <br />0.0053 m <br /> (0.73 cm7.3 mm <br />0.0073 m <br />) +
1.99 cm19.9 mm <br />0.0199 m <br /> (2.8 cm28 mm <br />0.028 m <br />) +
1.21 cm12.1 mm <br />0.0121 m <br /> (1.99 cm19.9 mm <br />0.0199 m <br />) +
Flowering May–Jun +  and fruiting Jul–Aug. +
adnate +, free +, connate +  and distinct +
black +  and dark purple +
10 cm100 mm <br />0.1 m <br /> (?) +
2.6 cm26 mm <br />0.026 m <br /> (3.3 cm33 mm <br />0.033 m <br />) +
1.8 cm18 mm <br />0.018 m <br /> (2.6 cm26 mm <br />0.026 m <br />) +
4-17-flowered +
not arillate +
0.49 cm4.9 mm <br />0.0049 m <br /> (0.65 cm6.5 mm <br />0.0065 m <br />) +
persistent +
free +  and distinct +
spreading +  and recurved +
triangular +  and lanceolate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.49 cm4.9 mm <br />0.0049 m <br />) +
free +  and distinct +
branched +  and simple +
erect +  and ascending +
1 +  and 20 +
0.36 cm3.6 mm <br />0.0036 m <br /> (0.42 cm4.2 mm <br />0.0042 m <br />) +
persistent +
connate +  and distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
0.28 cm2.8 mm <br />0.0028 m <br /> (0.36 cm3.6 mm <br />0.0036 m <br />) +
A. sanguinea var. grandiflora +
Amelanchier amabilis +
Amelanchier +
species +
6 +  and 10 +
inconspicuous +