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necklace cotoneaster, winter-green cotoneaster

creeping 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, mound-forming, to 0.3 m. Stems divaricate, prostrate to procumbent, rooting, to 0.8 m long, stiff; branches distichous, maroon, initially strigose-villous.
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 1–2 mm, glabrescent;

blade elliptic or ovate, rarely suborbiculate, 8–15 × 5–12 mm, chartaceous, base rounded, margins slightly undulate, not revolute, veins 2 or 3, superficial, apex acute or obtuse, abaxial surfaces green, glabrate, midrib strigose, adaxial green, dull to slightly shiny, not glaucous, flat between lateral veins, glabrous.

Inflorescences

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

on fertile shoots 6–10 mm with 2 or 3 leaves, 1(or 2)-flowered, subsessile.

Pedicels

1–3 mm, pilose-strigose.

0–1.5 mm, glabrate.

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).

4–7 mm;

hypanthium funnelform, maroon, glabrate;

sepals sometimes recurved, margins villous, apex lingulate or acute, surfaces glabrous;

petals erect, dark red;

stamens 10(–13), filaments pink to red, 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.

bright red, broadly obovoid to globose, 6–7 mm, shiny, not glaucous, succulent, glabrous;

sepals suberect, glabrous;

navel open;

style remnants 4/5 from base.

Pyrenes

2(or 3).

2(or 3).

2n

= 34 (Germany).

= 34 (Sweden).

Cotoneaster conspicuus

Cotoneaster adpressus

Phenology Flowering Apr–May; fruiting Oct–May. Flowering Apr–May; fruiting Sep.
Habitat Brushy edges in urban areas Disturbed ground, gravel pits
Elevation 0–50 m (0–200 ft) 0–400 m (0–1300 ft)
Distribution
from FNA
WA; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
from FNA
MI; Asia (China) [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.)

Source FNA vol. 9, p. 457. FNA vol. 9, p. 460.
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. 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. 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) Bois: Bull. Soc. Bot. France 51(sess. extraord.): cxlix, fig. [p. cl.] (1907)
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