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Yunnan cotoneaster

tree cotoneaster

Habit Shrubs, to 0.4 m. Stems prostrate or nearly so, carpeting, rooting; branches spiraled and distichous, dense, red to purple-black, slender, initially yellow-green strigose. Shrubs or trees, 5–15 m. Stems loosely erect, spreading; branches spiraled, dark brown, initially downy.
Leaves

persistent;

petiole 1–4 mm, strigose;

blade obovate to broadly obovate, rarely suborbiculate, 5–14 × 3–9 mm, coriaceous, base obtuse or broadly cuneate, margins slightly revolute, veins 2 or 3, superficial, apex obtuse, sometimes emarginate, abaxial surfaces grayish, reticulate, initially densely strigose-villous, adaxial dark green, shiny, not glaucous, sometimes lightly rugose, glabrescent.

deciduous;

petiole 5–8 mm, densely villose to tomentose;

blade narrowly elliptic (to lance-elliptic or narrowly obovate), 55–150 × 19–55 mm, membranous, base cuneate, margins flat, veins 6–10, superficial or slightly sunken, apex acute, abaxial surfaces color not recorded, villous at least near midvein, adaxial green, dull, coating not recorded, flat between lateral veins, glabrous except villous midrib.

Inflorescences

on fertile shoots 8–15 mm, usually with 4 leaves, 1(–3)-flowered.

on fertile shoots 60–80 mm with 2–4 leaves, 20–60-flowered, lax.

Pedicels

3–5 mm, strigose.

length not recorded, densely tomentose.

Flowers

7–10 mm diam.;

buds pinkish;

hypanthium cupulate, strigose or pilose-strigose;

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

petals spreading, white, glabrous;

stamens (15–)20, filaments white, anthers dark purple;

styles 2(or 3).

6–7 mm diam.;

buds white;

hypanthium cupulate [subcylindric], tomentose;

sepals: margins tomentose, apex acute, surfaces densely villous;

petals spreading, white, glabrous or with hair tuft;

stamens 20, filaments white, anthers purple;

styles 2.

Pomes

bright red to crimson, subglobose, 7–9 × 8–10 mm, slightly shiny, not glaucous, sparsely pilose;

sepals suberect, sparsely strigose;

navel slightly open;

style remnants at apex on small projection.

bright red, subglobose to ellipsoid, 4–6 × 4–5 mm, shiny, not glaucous, sparsely villous;

sepals erect or ascending, margins tomentose, densely villous;

navel hidden;

style remnants near apex.

Pyrenes

2(or 3).

2.

2n

= 68 (Germany).

= 34 (India).

Cotoneaster cochleatus

Cotoneaster frigidus

Phenology Flowering May–Jun; fruiting Sep–Nov. Flowering May–Jun; fruiting Sep–Oct.
Habitat Forest edges North-facing canyon slopes
Elevation 0–50 m (0–200 ft) 0–500 m (0–1600 ft)
Distribution
from FNA
NY; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
from FNA
CA; Asia (Himalaya Mountains) [Introduced in North America; introduced also in Europe]
[BONAP county map]
Discussion

Cotoneaster cochleatus was treated as a variety of C. microphyllus by L. Lingdi and A. R. Brach (2003); here the two are distinguished at species rank, following H. Nybom et al. (2005). Plants of C. microphyllus have a suberect habit, usually elliptic leaves (rarely broadly obovate) with acute apices, and pomes 6 mm wide; C. cochleatus is always prostrate and has usually obovate leaves (rarely suborbiculate) with blunt apices, and pomes 8–10 mm wide.

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

Reports of Cotoneaster frigidus from Washington (F. C. Weinmann 2000; A. L. Jacobson 2001; J. T. Kartesz 2006) are here referred to C. gamblei, plants having larger fruits tending to be obovoid, less densely pubescent inflorescences, and with thicker, more persistent leaves.

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

Source FNA vol. 9, p. 459. FNA vol. 9, p. 456.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Maleae > Cotoneaster Rosaceae > subfam. Amygdaloideae > tribe Maleae > Cotoneaster
Sibling taxa
C. adpressus, C. atropurpureus, 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. 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
C. adpressus, C. atropurpureus, C. cochleatus, C. conspicuus, C. crispii, C. dammeri, C. dielsianus, C. divaricatus, C. fangianus, C. franchetii, 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. buxifolius, C. microphyllus var. cochleatus, C. thymifolius var. cochleatus
Name authority (Franchet) G. Klotz: Wiss. Z. Martin-Luther-Univ. Halle-Wittenberg, Math.-Naturwiss. Reihe 6: 952. (1957) Wallich ex Lindley: Edwards's Bot. Reg. 15: plate 1229. (1829)
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