Cotoneaster monopyrenus |
Cotoneaster dammeri |
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one-stone cotoneaster |
bearberry cotoneaster |
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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). |
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Cotoneaster monopyrenus |
Cotoneaster dammeri |
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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 |
WA; Asia (China) [Introduced in North America; introduced also in Europe] |
WA; BC; Asia (China) [Introduced in North America; introduced also in Europe] |
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.) |
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Source | FNA vol. 9, p. 457. | FNA vol. 9, p. 459. |
Parent taxa | ||
Sibling taxa | ||
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 |