Cotoneaster lucidus |
Cotoneaster dielsianus |
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cotonéaster à feuilles aiguës, hedge cotoneaster, shiny cotoneaster |
diel's cotoneaster |
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Habit | Shrubs, 1.5–2.5 m. Stems erect, arching, or spreading; branches spiraled or distichous, dense, greenish gray to maroon, not lenticellate, initially strigose. | Shrubs, 2–4 m. Stems narrowly erect, spreading; branches distichous, grayish brown, initially tomentose-pilose. |
Leaves | deciduous; petiole 4–8 mm, strigose; blade elliptic or ovate, sometimes obovate, 28–50(–65) x 17–32(–40) mm, chartaceous, base cuneate or rounded, margins flat, not revolute, veins 3–5, sunken, apex short-acuminate or acute, abaxial surfaces green, sparsely pilose-strigose, adaxial dark green, intensely shiny, not glaucous, flat or scarcely bulging between lateral veins, slightly rugose, initially sparsely strigose; fall leaves intense dark red, yellow, or orange. |
deciduous; petiole 2–5 mm, tomentose-pilose; blade ovate to elliptic or broadly ovate, 9–38 × 7–23 mm, coriaceous or subcoriaceous, base obtuse or cuneate, margins flat, not revolute, veins 2–4, lightly sunken, apex acute or acuminate, abaxial surfaces densely grayish tomentose, adaxial dark green to grayish green, shiny, not glaucous, flat, rarely slightly bulging, between lateral veins, slightly rugose, pilose; fall leaves bright yellow to orange or red. |
Inflorescences | on fertile shoots 25–50 mm with 4 or 5 leaves, 2–6(–15)-flowered, lax. |
on fertile shoots 10–35 mm with 4 leaves, 2–7(–10)-flowered, compact. |
Pedicels | 5–12 mm, sparsely pilose. |
1–3 mm, tomentose-strigose. |
Flowers | 5.5–8 mm, largely open; hypanthium cupulate, base sparsely pilose, glabrescent; sepals: margins villous, apex acute or acuminate, surfaces glabrous; petals erect, pinkish white, sometimes green-tinged, base dark pink or reddish; stamens 18–20, filaments pink, base dark pink, anthers white; styles 2 or 3. |
erect, 6–7.5 mm, closed; hypanthium funnelform, proximally tomentose-strigose, distally tomentose-pilose; sepals: margins reddish tomentose, borders purple, broad, glabrous, apex cuspidate or apiculate, surfaces pilose; petals erect-incurved, dark pink to red, base dark red, margins off-white; stamens 14–20, filaments red to dark red, anthers white; styles 3 or 4(or 5). |
Pomes | black, broadly obovoid to obovoid, rarely ellipsoid or globose, (8–)9.5–12.1 x (7.5–)8.7–11.8 mm, shiny, glaucous, sparsely pilose; sepals flat, margins villous, sparsely pilose; navel open; style remnants 2/3 from base. |
bright red, broadly obovoid, sometimes globose or depressed-globose, 5–9.1 × 5.1–8.8 mm, slightly shiny, not glaucous, pilose; sepals flat, tomentose; navel open; style remnants 1/2–2/3 from base. |
Pyrenes | 2 or 3. |
3 or 4(or 5). |
2n | = 68 (Germany). |
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Cotoneaster lucidus |
Cotoneaster dielsianus |
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Phenology | Flowering Mar–Jul (sometimes reflowering in Sep); fruiting Jul–Oct. | Flowering May–Jun; fruiting Aug–Mar. |
Habitat | Deciduous or coniferous forests, ravines, lakeshores, forested dunes, thickets, edges | Edges of woods, disturbed forests, flood plains, thickets, waste ground, cliffs, meadows, brushy wet prairie remnants |
Elevation | 0–2300 m (0–7500 ft) | 0–500 m (0–1600 ft) |
Distribution |
CO; ID; IN; MN; WA; WY; AB; BC; MB; ON; QC; SK; Asia (Mongolia, Siberian Russia) [Introduced in North America; introduced also in Europe] |
OR; WA; BC; Asia (China) [Introduced in North America; introduced also in Europe] |
Discussion | Leaf glossiness is often retained on herbarium specimens and is visible with strong lighting and magnification. Plants of Cotoneaster acutifolius of China and Mongolia are seldom seen in cultivation. Reports of it naturalized in North America are here referred to the commonly cultivated C. lucidus, which tolerates continental winters. No specimens have been seen to support reports of the latter from Montana and Oregon. Some reports of C. melanocarpus from Alberta and Manitoba (H. J. Scoggan 1978–1979, part 3) are here referred to C. lucidus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
L. Lingdi and A. R. Brach (2003) included within Cotoneaster dielsianus several taxa recognized here as distinct species, including C. bradyi J. Fryer & E. C. Nelson and C. splendens Flinck & B. Hylmö. Some collections from Oregon approach an undescribed species from China but differ in fruit shape. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 463. | FNA vol. 9, p. 466. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | C. acutifolius var. lucidus | |
Name authority | Schlechtendal: Linnaea 27: 541. (1854) | E. Pritz ex Diels: Bot. Jahrb. Syst. 29: 385. (1900) |
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