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necklace cotoneaster, winter-green cotoneaster

cotonéaster à feuilles aiguës, hedge cotoneaster, shiny cotoneaster

Habit Shrubs, 0.5–1[–2.5] m. Stems weakly ascending or mound-forming [prostrate]; branches spiraled or distichous, dense, maroon, initially strigose. Shrubs, 1.5–2.5 m. Stems erect, arching, or spreading; branches spiraled or distichous, dense, greenish gray to maroon, not lenticellate, initially strigose.
Leaves

persistent;

petiole 1–3 mm, pilose-strigose;

blade elliptic to narrowly elliptic, rarely lanceolate, 6–12(–20) x 2–6(–8) mm, subcoriaceous or coriaceous, base cuneate, margins revolute, veins 3–5, superficial, apex obtuse or acute, abaxial surfaces grayish green, reticulate, initially pilose-strigose, adaxial grayish green [rarely green], dull to slightly shiny, coating not recorded, slightly rugose, sparsely pilose or glabrous.

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 8–12 mm with 3 or 4 leaves, 1-flowered, 2–4-flowered on shoot tips.

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

Pedicels

1–3 mm, pilose-strigose.

5–12 mm, sparsely pilose.

Flowers

9–13 mm diam.;

buds pink;

hypanthium cupulate, pilose-strigose;

sepals: margins villous, borders mostly reddish, membranous, apex acute or obtuse, surfaces pilose-strigose;

petals spreading, white;

stamens 17–21, filaments white, anthers purple-black;

styles 2(or 3).

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

orange-red to red, depressed-globose, 8–10 × 9–11 mm, shiny, not glaucous, glabrous;

sepals suberect, pilose;

navel not recorded;

style remnants at elongated apex.

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).

2 or 3.

2n

= 34 (Germany).

= 68 (Germany).

Cotoneaster conspicuus

Cotoneaster lucidus

Phenology Flowering Apr–May; fruiting Oct–May. Flowering Mar–Jul (sometimes reflowering in Sep); fruiting Jul–Oct.
Habitat Brushy edges in urban areas 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

G. Klotz (1963) emended the diagnosis of Cotoneaster conspicuus to recognize erect plants as var. conspicuus and more decumbent plants as var. decorus. This variation in habit is not significant taxonomically and not unusual for an outcrossing diploid, so the emended description by Klotz of the species is superfluous.

(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. 457. 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. 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. 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. 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. microphyllus var. conspicuus, C. conspicuus var. decorus, C. conspicuus var. nanus, C. nanus, C. permutatus C. acutifolius var. lucidus
Name authority (Messel) Messel: J. Roy. Hort. Soc. 59: 303. (1934) Schlechtendal: Linnaea 27: 541. (1854)
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