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necklace cotoneaster, winter-green cotoneaster

cotoneaster, willow-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 or trees, 1–8 m. Stems erect or arching [prostrate]; branches spiraled or distichous, arching, maroon, slender, initially tomentose-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 3–8 mm, tomentose-strigose;

blade narrowly elliptic to elliptic-lanceolate, 30–90 × 8–23 mm, coriaceous, base cuneate, margins strongly revolute, veins 7–12, deeply sunken, apex gradually tapered, acute or acuminate, abaxial surfaces grayish green, initially densely villous, becoming glabrous or glabrate, adaxial dark green, shiny, not glaucous, bulging between lateral veins, sparsely pilose initially.

Inflorescences

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

on fertile shoots 20–60 mm with 3 or 4 leaves, 10–50-flowered, compact.

Pedicels

1–3 mm, pilose-strigose.

0.5–3(–4 mm), densely strigose-villous.

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–)6–9 mm diam.;

buds white;

hypanthium funnelform, pilose;

sepals: margins sparsely villous, apex acute, surfaces sparsely pilose;

petals spreading, white, glabrous;

stamens 20, filaments white, anthers red-purple;

styles 2 or 3(or 4).

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.

bright red (or with hint of crimson), broadly obovoid to globose, (5–)6–8.5 x (5–)6–8 mm, shiny, not glaucous, sparsely pilose;

sepals depressed or flat, sparsely pilose;

navel slightly open;

style remnants at apex.

Pyrenes

2(or 3).

2 or 3(or 4).

2n

= 34 (Germany).

= 34 (Germany).

Cotoneaster conspicuus

Cotoneaster salicifolius

Phenology Flowering Apr–May; fruiting Oct–May. Flowering May–Jun; fruiting Oct–Apr.
Habitat Brushy edges in urban areas Thickets, mossy cliffs, cracks in walls, lakeshores, urban waste ground
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
WA; BC; Asia (China: Sichuan, Xizang) [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.)

L. Lingdi and A. R. Brach (2003) included as varieties of Cotoneaster salicifolius several taxa that here are considered full species, such as C. henryanus (C. K. Schneider) Rehder & E. H. Wilson, C. hylmoei Flinck & J. Fryer, and C. rugosus E. Pritzel.

A horticultural hybrid, presumably between Cotoneaster dammeri and C. salicifolius, is known in gardens as the cultivar Cotoneaster 'Hybridus Pendulus' and was recently collected as a local escape from cultivation in King County, Washington. This hybrid would key to C. x\suecicus but differs in its limp branching, much larger leaves (20–80 × 10–30 mm) and more numerous and smaller diameter flowers (9–11 mm wide). The foliage of the hybrid closely resembles C. salicifolius, but it has fewer (4–13) and larger flowers and is less than 1 m in height.

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

Source FNA vol. 9, p. 457. FNA vol. 9, p. 454.
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. lucidus, C. magnificus, C. melanocarpus, C. miniatus, C. monopyrenus, C. nitens, C. pannosus, C. qungbixiensis, C. rehderi, 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
Name authority (Messel) Messel: J. Roy. Hort. Soc. 59: 303. (1934) Franchet: Nouv. Arch. Mus. Hist. Nat., sér. 2, 8: 225. (1885)
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