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Yunnan cotoneaster

Stern's 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, 1.5–4 m. Stems erect, arching, stiff; branches distichous, maroon, whitish tomentose-pilose.
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.

persistent;

petiole 4–6 mm, tomentose-pilose;

blade elliptic to broadly ovate, (18–)25–52(–56) x (12–)16–28(–34) mm, coriaceous, base obtuse or cuneate, margins recurved, veins 4–6, deeply sunken, apex acute or acuminate, abaxial surfaces whitish tomentose, adaxial dark green, slightly shiny, not glaucous, on vigorous shoots usually bulging slightly between lateral veins (unless shaded), very rugose, pilose.

Inflorescences

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

on fertile shoots 25–70 mm with 3–5 leaves, 7–20-flowered, compact.

Pedicels

3–5 mm, strigose.

1–4 mm, tomentose-pilose.

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).

(5–)6–7.5 mm, opening small;

hypanthium cupulate, silky tomentose;

sepals: margins villous, borders purple, glabrous, apex acute or acuminate, surfaces silky tomentose;

petals erect-incurved, pink to red, base dark red (with minute black dots), margins erect-incurved, pink or white;

stamens 20, filaments red, distally pink or whitish, anthers white, sutures pink-tinged;

styles (2 or)3 or 4(or 5).

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 orange, eventually orange-red, subglobose to depressed-globose or globose, 6–10 × 6–10 mm, base rounded, shiny, not glaucous, pilose;

sepals flat, tomentose; forming 5-pointed star over closed navel;

style remnants 3/4 from base.

Pyrenes

2(or 3).

(2 or)3 or 4(or 5).

2n

= 68 (Germany).

Cotoneaster cochleatus

Cotoneaster sternianus

Phenology Flowering May–Jun; fruiting Sep–Nov. Flowering Jun–Jul; fruiting Oct–Jan.
Habitat Forest edges Mossy cliffs, thickets, hedges, urban waste ground
Elevation 0–50 m (0–200 ft) 0–200 m (0–700 ft)
Distribution
from FNA
NY; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
from FNA
BC; Asia (China, Myanmar) [Introduced in North America; introduced also in Europe, Pacific Islands (New Zealand)]
[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.)

Cotoneaster sternianus is similar to C. franchetii, a species with more elongated pomes, uniformly pink or purple anthers, and less textured leaves.

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

Source FNA vol. 9, p. 459. FNA vol. 9, p. 466.
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. 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. tengyuehensis, C. transens, C. vestitus, C. villosulus, C. ×suecicus
Synonyms C. buxifolius, C. microphyllus var. cochleatus, C. thymifolius var. cochleatus C. franchetii var. sternianus
Name authority (Franchet) G. Klotz: Wiss. Z. Martin-Luther-Univ. Halle-Wittenberg, Math.-Naturwiss. Reihe 6: 952. (1957) (Turrill) Boom: Jaarb. Ned. Dendrol. Ver. 20: 81. (1957)
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