Cotoneaster monopyrenus |
Cotoneaster franchetii |
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one-stone cotoneaster |
cotoneaster, Franchet's cotoneaster, orange 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, 2–3 m. Stems erect, arching, lax, slender; branches distichous, maroon, initially densely 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, often 30–40 mm apart; petiole 2–4 mm, tomentose-pilose; blade ovate or elliptic, 22–58 × 12–29 mm, coriaceous, base cuneate or obtuse, margins flat, veins 4 or 5, sunken, apex acute or acuminate, mucronate, abaxial surfaces silvery-tomentose, adaxial grayish green, slightly shiny, not glaucous, flat, rarely slightly bulging between lateral veins, drying slightly rugose, pilose. |
Inflorescences | on fertile shoots 30–50 mm with 3–4 leaves, 7–20-flowered, lax. |
on fertile shoots 30–60 mm with 4 leaves, 5–15(–25)-flowered, compact. |
Pedicels | 2–5 mm, pilose-strigose. |
1–4 mm, densely long-silky hairy. |
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). |
(5–)7–8(–10) mm, opening small; hypanthium cupulate, densely long-silky hairy; sepals: margins villous, borders purple, glabrous, apex cuspidate or acuminate, surfaces silky hairy; petals erect-incurved, pink or red, base dark pink to dark red, margins off-white; stamens 16–21, filaments pink, distally white, anthers pink or purplish pink; styles 2 or 3(or 4). |
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. |
orange-red, obovoid base rounded or obconic base cuneate, straight-sided, 8–12 × 6–9 mm, apex flat, shiny, not glaucous, sparsely pilose; sepals flat, often asymmetric with 2 sepals longer than others, tomentose; navel slightly open; style remnants 3/4 from base. |
Pyrenes | 1(or 2). |
2 or 3(or 4). |
2n | = 68 (Germany). |
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Cotoneaster monopyrenus |
Cotoneaster franchetii |
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Phenology | Flowering May–Jun; fruiting Jul–Nov. | Flowering May–Jul; fruiting Oct–Apr. |
Habitat | Thickets | Edges, thickets, disturbed forests, flood plains, urban waste ground, mossy ledges, wet prairie remnants |
Elevation | 0–200 m (0–700 ft) | 0–700 m (0–2300 ft) |
Distribution |
WA; Asia (China) [Introduced in North America; introduced also in Europe] |
CA; OR; WA; BC; Asia (China) [Introduced in North America; introduced also in Europe, Pacific Islands (New Zealand), Australia]
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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.) |
Reports of Cotoneaster franchetii from Colorado (J. Ells 2006) are here referred to C. lucidus. A few specimens escaped in Washington have red filaments, not pink, but otherwise agree with C. franchetii. Other escapes in Washington suggest the closely related C. wardii W. W. Smith, distinguished by semievergreen habit, longer fertile shoots, more lax and elongate inflorescences, and white anthers. The entire complex needs biosystematic review. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 457. | FNA vol. 9, p. 465. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | C. hebephyllus var. monopyrenus | |
Name authority | (W. W. Smith) Flinck & B. Hylmö: Bot. Not. 119: 459. (1966) | Bois: Rev. Hort. 74: 380, figs. 159–161, 164. (1902) |
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