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necklace cotoneaster, winter-green cotoneaster

entire-leaf cotoneaster, small-leaf 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, wide-spreading, 0.5–1.5 m. Stems weakly ascending, suberect, or decumbent; branches spiraled, purple-black, sometimes green and brown striate, 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.

persistent, petiole 1–5 mm, strigose;

blade oblanceolate or oblong, rarely lanceolate, 8–17 × 3–8 mm, coriaceous, base cuneate, margins revolute, veins 2–4, superficial, apex rotund or obtuse, rarely emarginate or acute, abaxial surfaces grayish white, faintly reticulate, initially densely strigose or strigose-pilose, later glabrate, adaxial dark green, sometimes blue-green, shiny, not glaucous, not bulging between lateral veins, initially strigose, soon glabrate.

Inflorescences

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

on fertile shoots 5–12 mm with 2 or 3 leaves, 1(or 2)-flowered, subsessile.

Pedicels

1–3 mm, pilose-strigose.

erect, densely strigose.

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).

7–15 mm diam.;

buds pink;

hypanthium narrowly cupulate, densely strigose;

sepals: margins densely villose-strigose, borders membranous, apex often red, acute or obtuse, sometimes shortly mucronate, surfaces often densely strigose-villous;

petals spreading, white, glabrous;

stamens 20, filaments white, anthers red-purple;

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.

dark red with crimson, sometimes red, depressed-globose, 7–9 × 7–10 mm, dull or slightly shiny, glaucous, sparsely villous;

sepals suberect or erect, villous;

navel open;

style remnants at apex.

Pyrenes

2(or 3).

2[or 3].

2n

= 34 (Germany).

= 68 (Germany).

Cotoneaster conspicuus

Cotoneaster integrifolius

Phenology Flowering Apr–May; fruiting Oct–May. Flowering Apr–Jun; fruiting Aug–Mar.
Habitat Brushy edges in urban areas Openings in conifer forests
Elevation 0–50 m (0–200 ft) 0–200 m (0–700 ft)
Distribution
from FNA
WA; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
from FNA
CA; Asia [Introduced in North America; introduced also in Europe]
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.)

Cotoneaster integrifolius was treated as C. microphyllus Wallich ex Lindley var. thymifolius (Baker) Koehne by L. Lingdi and A. R. Brach (2003).

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

Source FNA vol. 9, p. 457. FNA vol. 9, p. 458.
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. 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. microphyllus var. conspicuus, C. conspicuus var. decorus, C. conspicuus var. nanus, C. nanus, C. permutatus Crataegus integrifolius
Name authority (Messel) Messel: J. Roy. Hort. Soc. 59: 303. (1934) (Roxburgh) G. Klotz: Wiss. Z. Martin-Luther-Univ. Halle-Wittenberg, Math.-Naturwiss. Reihe 12: 779. (1963)
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