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cotonéaster à feuilles aiguës, hedge cotoneaster, shiny cotoneaster

Gamble's cotoneaster

Habit Shrubs, 1.5–2.5 m. Stems erect, arching, or spreading; branches spiraled or distichous, dense, greenish gray to maroon, not lenticellate, initially strigose. Shrubs or trees, 4–10 m. Stems loosely erect, spreading and arching; branches spiraled, brown or maroon-purple, initially tomentose-strigose.
Leaves

deciduous;

petiole 4–8 mm, strigose;

blade elliptic or ovate, sometimes obovate, 28–50(–65) x 17–32(–40) mm, chartaceous, base cuneate or rounded, margins flat, not revolute, veins 3–5, sunken, apex short-acuminate or acute, abaxial surfaces green, sparsely pilose-strigose, adaxial dark green, intensely shiny, not glaucous, flat or scarcely bulging between lateral veins, slightly rugose, initially sparsely strigose;

fall leaves intense dark red, yellow, or orange.

usually semipersistent (persisting to April if sheltered), sometimes deciduous;

petiole 4–10 mm, densely villose-strigose;

blade elliptic, (25–)50–127 × 13–49[–62 in cultivation] mm, chartaceous or subcoriaceous, base cuneate or obtuse, margins flat, veins 7 or 8, superficial, apex acute or obtuse, abaxial surfaces pale gray-green, initially villous, later glabrate, adaxial dark green, shiny, not glaucous, flat between lateral veins, sometimes becoming slightly rugose, glabrate;

fall leaves pale yellowish green.

Inflorescences

on fertile shoots 25–50 mm with 4 or 5 leaves, 2–6(–15)-flowered, lax.

on fertile shoots 40–70 mm with 2 or 3 leaves, 5–34-flowered, lax.

Pedicels

5–12 mm, sparsely pilose.

1–8 mm, sparsely villose-strigose.

Flowers

5.5–8 mm, largely open;

hypanthium cupulate, base sparsely pilose, glabrescent;

sepals: margins villous, apex acute or acuminate, surfaces glabrous;

petals erect, pinkish white, sometimes green-tinged, base dark pink or reddish;

stamens 18–20, filaments pink, base dark pink, anthers white;

styles 2 or 3.

8–12.5 mm diam.;

buds white;

hypanthium cupulate, densely villous;

sepals: margins maroon, tomentose, apex acute, surfaces densely villous;

petals spreading, white, sometimes with hair tuft;

stamens 18–20, filaments white, anthers red-purple or dark red-purple;

styles (1 or)2.

Pomes

black, broadly obovoid to obovoid, rarely ellipsoid or globose, (8–)9.5–12.1 x (7.5–)8.7–11.8 mm, shiny, glaucous, sparsely pilose;

sepals flat, margins villous, sparsely pilose;

navel open;

style remnants 2/3 from base.

red, often tinged with pink, green, brown, or purple, obovoid, rarely subglobose, 8.5–12.8 × 8–12 mm, dull, slightly glaucous, sparsely villous;

sepals flat, margins tomentose, densely villous;

navel slightly open;

style remnants near apex.

Pyrenes

2 or 3.

[1 or]2.

2n

= 68 (Germany).

Cotoneaster lucidus

Cotoneaster gamblei

Phenology Flowering Mar–Jul (sometimes reflowering in Sep); fruiting Jul–Oct. Flowering May; fruiting Sep–Nov.
Habitat Deciduous or coniferous forests, ravines, lakeshores, forested dunes, thickets, edges Mesic thickets, flood plains, disturbed forests
Elevation 0–2300 m (0–7500 ft) 0–50 m (0–200 ft)
Distribution
from FNA
CO; ID; IN; MN; WA; WY; AB; BC; MB; ON; QC; SK; Asia (Mongolia, Siberian Russia) [Introduced in North America; introduced also in Europe]
[BONAP county map]
from FNA
WA; Asia (Bhutan, India) [Introduced in North America]
[BONAP county map]
Discussion

Leaf glossiness is often retained on herbarium specimens and is visible with strong lighting and magnification.

Plants of Cotoneaster acutifolius of China and Mongolia are seldom seen in cultivation. Reports of it naturalized in North America are here referred to the commonly cultivated C. lucidus, which tolerates continental winters. No specimens have been seen to support reports of the latter from Montana and Oregon. Some reports of C. melanocarpus from Alberta and Manitoba (H. J. Scoggan 1978–1979, part 3) are here referred to C. lucidus.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 9, p. 463. FNA vol. 9, p. 456.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Maleae > Cotoneaster Rosaceae > subfam. Amygdaloideae > tribe Maleae > Cotoneaster
Sibling taxa
C. adpressus, C. atropurpureus, C. cochleatus, C. conspicuus, C. crispii, C. dammeri, C. dielsianus, C. divaricatus, C. fangianus, C. franchetii, C. frigidus, C. gamblei, C. hjelmqvistii, C. hodjingensis, C. horizontalis, C. integrifolius, C. lacteus, C. magnificus, C. melanocarpus, C. miniatus, C. monopyrenus, C. nitens, C. pannosus, C. qungbixiensis, C. rehderi, C. salicifolius, C. simonsii, C. sternianus, C. tengyuehensis, C. transens, C. vestitus, C. villosulus, C. ×suecicus
C. adpressus, C. atropurpureus, C. cochleatus, C. conspicuus, C. crispii, C. dammeri, C. dielsianus, C. divaricatus, C. fangianus, C. franchetii, C. frigidus, C. hjelmqvistii, C. hodjingensis, C. horizontalis, C. integrifolius, C. lacteus, C. lucidus, C. magnificus, C. melanocarpus, C. miniatus, C. monopyrenus, C. nitens, C. pannosus, C. qungbixiensis, C. rehderi, C. salicifolius, C. simonsii, C. sternianus, C. tengyuehensis, C. transens, C. vestitus, C. villosulus, C. ×suecicus
Synonyms C. acutifolius var. lucidus
Name authority Schlechtendal: Linnaea 27: 541. (1854) G. Klotz: Wiss. Z. Martin-Luther-Univ. Halle-Wittenberg, Math.-Naturwiss. Reihe 15: 530. (1966)
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