The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links

one-stone cotoneaster

bearberry cotoneaster

Habit Shrubs or trees, 3–5 m. Stems loosely erect, arching, spreading; branches spiraled, maroon, lenticellate, initially pilose-strigose. Shrubs, to 0.2 m. Stems carpeting or procumbent, rooting, to 1.5 m, pliant; branches distichous or spiraled, greenish to light brown, densely lenticellate, initially pilose-strigose.
Leaves

deciduous;

petiole 5–9 mm, pilose-strigose;

blade elliptic, broadly elliptic, or broadly obovate, sometimes suborbiculate, 25–58 × 15–40 mm, subcoriaceous, base obtuse or cuneate, margins flat, veins 4–6, slightly sunken, apex obtuse or truncate, seldom acute, abaxial surfaces color not recorded, reticulate, tomentose-pilose, later thinning, adaxial dark green, dull, coating not recorded, flat between lateral veins, glabrescent;

fall leaves pale yellowish green.

persistent;

petiole 2–9 mm, villose-strigose;

blade elliptic or obovate, rarely suborbiculate, 13–43 × 6–26 mm, coriaceous, base cuneate or obtuse, margins revolute, veins 5–8, sunken, apex obtuse or acute, rarely retuse, abaxial surfaces grayish green, reticulate, initially villous, adaxial light green to green, intensely shiny, not glaucous, reticulate-rugose, not bulging between lateral veins, often single hairs on midrib.

Inflorescences

on fertile shoots 30–50 mm with 3–4 leaves, 7–20-flowered, lax.

on fertile shoots 20–40 mm, usually with 4 leaves, (1 or)2 or 3(or 4)-flowered, compact.

Pedicels

2–5 mm, pilose-strigose.

4–15 mm, thin, villose-strigose.

Flowers

10–12 mm diam., buds white, hypanthium campanulate to cupulate, sparsely pilose-strigose;

sepals: margins reddish, villous, borders maroon-tipped, membranous, apex acute, acuminate, or obtuse, surfaces sparsely pilose-strigose;

petals spreading, white, sometimes with hair tuft;

stamens (15–)20, filaments white;

anthers purple to blackish purple;

styles 1(or 2).

slightly pendent, 10–12 mm diam.;

buds white;

hypanthium cupulate, sparsely pilose-strigose;

sepals: margins sparsely villous, apex obtuse or acute, surfaces sparsely pilose-strigose;

petals spreading, white, glabrous;

stamens 20, filaments white, anthers purple-black;

styles 4 or 5.

Pomes

dark red or ruby to maroon, maturing dark purple or purple-black, obovoid, rarely globose or ellipsoid, 9–12.5 × 8.5–11.5 mm, dull, glaucous, glabrous;

sepals flat, margins sparsely hairy, sparsely hairy to glabrate;

navel open;

style remnants at apex.

bright red, obovoid to broadly obovoid, rarely globose, 6–10 × 6–8 mm, shiny, not glaucous, glabrous;

sepals suberect, glabrous;

navel open;

style remnants at apex.

Pyrenes

1(or 2).

4 or 5.

2n

= 34 (Germany).

Cotoneaster monopyrenus

Cotoneaster dammeri

Phenology Flowering May–Jun; fruiting Jul–Nov. Flowering May–Jun; fruiting Sep–Apr.
Habitat Thickets Disturbed forests, grassy banks, rock roadcuts, urban waste ground
Elevation 0–200 m (0–700 ft) 0–200 m (0–700 ft)
Distribution
from FNA
WA; Asia (China) [Introduced in North America; introduced also in Europe]
from FNA
WA; BC; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
Discussion

L. Lingdi and A. R. Brach (2003) synonymized Cotoneaster monopyrenus with C. hebephyllus (as C. hebephyllus var. hebephyllus).

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

Source FNA vol. 9, p. 457. FNA vol. 9, p. 459.
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. 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. 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. hebephyllus var. monopyrenus
Name authority (W. W. Smith) Flinck & B. Hylmö: Bot. Not. 119: 459. (1966) C. K. Schneider: Ill. Handb. Laubholzk. 1: 761, figs. 429 h–k. (1906)
Web links