Cotoneaster tengyuehensis |
Cotoneaster dielsianus |
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cotoneaster, Tengyueh cotoneaster |
diel's cotoneaster |
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Habit | Shrubs, 2–2.5 m; crown ± rounded. | Shrubs, 2–4 m. Stems narrowly erect, spreading; branches distichous, grayish brown, initially tomentose-pilose. |
Stems | erect, arching, long; branches distichous, grayish maroon, initially densely strigose. |
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Leaves | deciduous (sometimes tardily so on vigorous shoots); petiole 1–4 mm, strigose; blade ovate or elliptic, (25–)30–50(–61) x 12–32 mm, chartaceous, base cuneate or rounded, margins flat, veins 3–5, deeply sunken, apex acuminate or acute, abaxial surfaces grayish green, villose-strigose or sparsely to moderately gray-tomentose, adaxial green to dark green, shiny, not glaucous, flat or faintly bulging between lateral veins, pilose-strigose; fall leaves yellow to 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 25–40 mm with (3 or)4 leaves, 3–7(–9)-flowered, compact. |
on fertile shoots 10–35 mm with 4 leaves, 2–7(–10)-flowered, compact. |
Pedicels | 1–4 mm, densely strigose. |
1–3 mm, tomentose-strigose. |
Flowers | erect or ascending, [5–]6–8 mm, opening small; hypanthium cupulate, strigose; sepals: margins villous, borders reddish brown, glabrous, apex acuminate or cuspidate, surfaces strigose; petals erect-incurved, pink to red, base dark pink or red, rarely dark red or maroon, margins white; stamens 20 or 21, filaments pink or pale pink, whitish distally, anthers white; styles (2 or)3–5. |
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 | spreading or pendent, bright red, broadly obovoid or subglobose, rarely oblong-obovoid, 6.3–10.4 × 5.8–9.1 mm, shiny, not glaucous, sparsely strigose; sepals flat or suberect, strigose; navel closed; 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)3–5. |
3 or 4(or 5). |
2n | = 68 (Germany). |
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Cotoneaster tengyuehensis |
Cotoneaster dielsianus |
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Phenology | Flowering May–Jun; fruiting Sep–Feb. | Flowering May–Jun; fruiting Aug–Mar. |
Habitat | Thickets, creek banks, open forests, edges | Edges of woods, disturbed forests, flood plains, thickets, waste ground, cliffs, meadows, brushy wet prairie remnants |
Elevation | 0–50 m (0–200 ft) | 0–500 m (0–1600 ft) |
Distribution |
WA; Asia (China) [Introduced in North America; introduced also in Europe] |
OR; WA; BC; Asia (China) [Introduced in North America; introduced also in Europe] |
Discussion | L. Lingdi and A. R. Brach (2003) confused Cotoneaster tengyuehensis with C. glomerulatus W. W. Smith, a species with small fruits 5 mm in diameter, with 5 pyrenes and styles, and slightly smaller leaves to 40–50 mm. In the flora area, C. tengyuehensis is more likely to be mistaken for C. franchetii, which is a true evergreen with orange-red, obovate to obconic fruits, and pink to purple stamens. Naturalized shrubs of C. tengyuehensis drop their foliage in midwinter. (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. 465. | FNA vol. 9, p. 466. |
Parent taxa | ||
Sibling taxa | ||
Name authority | J. Fryer & B. Hylmö: Watsonia 21: 338. (1997) | E. Pritz ex Diels: Bot. Jahrb. Syst. 29: 385. (1900) |
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