Amelanchier nitens

Tidestrom

Proc. Biol. Soc. Wash. 36: 182. 1923.

Common names: Shining shadbush
Endemic
Synonyms: Amelanchier alnifolia var. nitens (Tidestrom) Munz
Treatment appears in FNA Volume 9. Treatment on page 650. Mentioned on page 649.

Shrubs, 2–6 m. Stems 20–150, in colonies. Leaves fully unfolded; petiole (2.5–) 3.4–6 (–8) mm; blade ovate to obovate, (6–) 16–24 (–31) × (7–) 11–16 (–19) mm, base cuneate to rounded, each margin with 0–3 (–6) teeth on proximal 1/2 and (0–) 2–6 (–9) teeth in distalmost cm, largest teeth less than 1 mm, apex acute to rounded, abaxial surface sparsely to moderately hairy (or glabrous) by flowering, surfaces moderately to densely hairy (or glabrous) later. Inflorescences (3 or) 4–7 (–12) -flowered, (8–) 10–18 (–27) mm. Pedicels: (0 or) 1 or 2 (or 3) subtended by a leaf, proximalmost (4–) 6–12 (–19) mm. Flowers: sepals spreading to recurved after flowering, (1.3–) 2.2–3.3 (–4.3) mm; petals linear to oblanceolate, (5.2–) 6.7–9.1 (–12.2) × (1.7–) 2.4–3.5 (–4.6) mm; stamens (7–) 12–19 (–21); styles 2–4 (or 5), (1.8–) 2.3–3.4 (–4.7) mm; ovary apex glabrous or sparsely to moderately (densely) hairy. Pomes pinkish purple, 8–14 mm diam. 2n = 2x.


Phenology: Flowering Apr–Jun; fruiting Jun–Jul.
Habitat: Dry rocky slopes, canyons, stream banks, mountainsides, foothills, high deserts
Elevation: 1500–2400 m

Discussion

Amelanchier nitens is rarely found outside of pinyon pine-juniper community types; it often grows adjacent to seasonal streams and washes. The species is distinguished by its lustrous and coriaceous leaves (particularly in lower elevation populations), moderately hairy twigs, usually salmon-colored bark on older branches and trunks, relatively short inflorescences, and (typically) three styles. Petioles on many live specimens are a bright, lustrous red, a character state that is less noticeable on herbarium specimens. Stems are usually highly contorted, with relatively short internodes, abundant short shoots, and, often, divaricately branching ultimate branches. Seeds of A. nitens are much larger than congenerics (a sample of 25 averaged 7.3 times heavier than 25 seeds from an average eastern North American Amelanchier).

The authors have observed incomplete herbarium specimens conforming to Amelanchier nitens (1923) morphology from Colorado, New Mexico, and Utah, including the type specimen of A. rubescens Greene (1900), which may prove to be the correct name for this species.

Selected References

None.

Lower Taxa

None.

... more about "Amelanchier nitens"
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 +
Tidestrom +
fissuring in older trees +  and smooth +
salmon colored +, brown +  and gray +
compound +  and simple +
opposite +  and alternate +
cuneate +  and rounded +
2.4 cm24 mm <br />0.024 m <br /> (3.1 cm31 mm <br />0.031 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
1.6 cm16 mm <br />0.016 m <br /> (2.4 cm24 mm <br />0.024 m <br />) +
ovate +  and obovate +
membranous +  and coriaceous +
11mm +  and 16mm +
adnate +  and connate +
Shining shadbush +
Ariz. +  and Nev. +
not +  and aggregated +
1500–2400 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 />) +
Dry rocky slopes, canyons, stream banks, mountainsides, foothills, high deserts +
glabrous +  and hairy +
4-7(-12)-flowered +
1.8 cm18 mm <br />0.018 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
nodding +, spreading +, drooping +, erect +, ascending +  and arching +
1 cm10 mm <br />0.01 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
crassinucellate +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
deciduous +
pinnate +, dentate +, serrate +  and entire +
toothed +, unlobed +  and lobed +
glabrous or +  and sparsely moderately hairy +
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 />) +
0.91 cm9.1 mm <br />0.0091 m <br /> (1.22 cm12.2 mm <br />0.0122 m <br />) +
0 (?) +  and 4 (?) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.46 cm4.6 mm <br />0.0046 m <br />) +
Pink (?) +, Ivory (?) +  and White (?) +
free +  and distinct +
0.67 cm6.7 mm <br />0.0067 m <br /> (0.91 cm9.1 mm <br />0.0091 m <br />) +
0.24 cm2.4 mm <br />0.0024 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Apr–Jun +  and fruiting Jun–Jul. +
adnate +, free +, connate +  and distinct +
pinkish purple +
0.8 cm8 mm <br />0.008 m <br /> (1.4 cm14 mm <br />0.014 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (1.9 cm19 mm <br />0.019 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
Proc. Biol. Soc. Wash. +
4-17-flowered +
not arillate +
0.33 cm3.3 mm <br />0.0033 m <br /> (0.43 cm4.3 mm <br />0.0043 m <br />) +
persistent +
free +  and distinct +
spreading +  and recurved +
triangular +  and lanceolate +
0.22 cm2.2 mm <br />0.0022 m <br /> (0.33 cm3.3 mm <br />0.0033 m <br />) +
free +  and distinct +
branched +  and simple +
erect +  and ascending +
20 +  and 150 +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.47 cm4.7 mm <br />0.0047 m <br />) +
persistent +
connate +  and distinct +
basal +, lateral +, subterminal +  and terminal +
elongate +
0.23 cm2.3 mm <br />0.0023 m <br /> (0.34 cm3.4 mm <br />0.0034 m <br />) +
Amelanchier alnifolia var. nitens +
Amelanchier nitens +
Amelanchier +
species +
0 +  and 3 +
inconspicuous +