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cotoneaster, Tengyueh cotoneaster

cotonéaster à feuilles aiguës, hedge cotoneaster, shiny cotoneaster

Habit Shrubs, 2–2.5 m; crown ± rounded. Shrubs, 1.5–2.5 m. Stems erect, arching, or spreading; branches spiraled or distichous, dense, greenish gray to maroon, not lenticellate, initially strigose.
Stems

erect, arching, long;

branches distichous, grayish maroon, initially densely strigose.

Leaves

deciduous (sometimes tardily so on vigorous shoots);

petiole 1–4 mm, strigose;

blade ovate or elliptic, (25–)30–50(–61) x 12–32 mm, chartaceous, base cuneate or rounded, margins flat, veins 3–5, deeply sunken, apex acuminate or acute, abaxial surfaces grayish green, villose-strigose or sparsely to moderately gray-tomentose, adaxial green to dark green, shiny, not glaucous, flat or faintly bulging between lateral veins, pilose-strigose;

fall leaves yellow to orange.

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.

Inflorescences

on fertile shoots 25–40 mm with (3 or)4 leaves, 3–7(–9)-flowered, compact.

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

Pedicels

1–4 mm, densely strigose.

5–12 mm, sparsely pilose.

Flowers

erect or ascending, [5–]6–8 mm, opening small;

hypanthium cupulate, strigose;

sepals: margins villous, borders reddish brown, glabrous, apex acuminate or cuspidate, surfaces strigose;

petals erect-incurved, pink to red, base dark pink or red, rarely dark red or maroon, margins white;

stamens 20 or 21, filaments pink or pale pink, whitish distally, anthers white;

styles (2 or)3–5.

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.

Pomes

spreading or pendent, bright red, broadly obovoid or subglobose, rarely oblong-obovoid, 6.3–10.4 × 5.8–9.1 mm, shiny, not glaucous, sparsely strigose;

sepals flat or suberect, strigose;

navel closed;

style remnants 2/3 from base.

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.

Pyrenes

(2 or)3–5.

2 or 3.

2n

= 68 (Germany).

= 68 (Germany).

Cotoneaster tengyuehensis

Cotoneaster lucidus

Phenology Flowering May–Jun; fruiting Sep–Feb. Flowering Mar–Jul (sometimes reflowering in Sep); fruiting Jul–Oct.
Habitat Thickets, creek banks, open forests, edges Deciduous or coniferous forests, ravines, lakeshores, forested dunes, thickets, edges
Elevation 0–50 m (0–200 ft) 0–2300 m (0–7500 ft)
Distribution
from FNA
WA; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
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]
Discussion

L. Lingdi and A. R. Brach (2003) confused Cotoneaster tengyuehensis with C. glomerulatus W. W. Smith, a species with small fruits 5 mm in diameter, with 5 pyrenes and styles, and slightly smaller leaves to 40–50 mm. In the flora area, C. tengyuehensis is more likely to be mistaken for C. franchetii, which is a true evergreen with orange-red, obovate to obconic fruits, and pink to purple stamens. Naturalized shrubs of C. tengyuehensis drop their foliage in midwinter.

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

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. 465. FNA vol. 9, p. 463.
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. lucidus, C. magnificus, C. melanocarpus, C. miniatus, C. monopyrenus, C. nitens, C. pannosus, C. qungbixiensis, C. rehderi, C. salicifolius, C. simonsii, C. sternianus, 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. 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
Synonyms C. acutifolius var. lucidus
Name authority J. Fryer & B. Hylmö: Watsonia 21: 338. (1997) Schlechtendal: Linnaea 27: 541. (1854)
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