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Mclaren's cotoneaster

Habit Shrubs or trees, 4–6 m. Stems loosely erect, spreading, stiff; branches spiraled, maroon, minutely verrucose, initially pilose-strigose.
Leaves

deciduous;

petiole 4–6 mm, densely pilose-strigose;

blade on sterile shoots elliptic, (35–)50–80(–103) x (13–)17–37(–42) mm, chartaceous, margins flat, base cuneate, veins 6–10, superficial or lightly sunken, apex acute or obtuse, abaxial surfaces color not recorded, villose-strigose, adaxial brownish green, soon green, dull, coating not recorded, flat between lateral veins, glabrate;

fall leaves yellow.

Inflorescences

on fertile shoots 40–50 mm with 2–4 leaves, 10–25-flowered, lax.

Pedicels

3–5 mm, densely pilose-strigose.

Flowers

10–12 mm diam.;

buds white;

hypanthium cupulate, villose-strigose;

sepals: margins villous, apex acute, surfaces sparsely villous;

petals spreading, white, with large hair tuft;

stamens (16–)20, filaments white, anthers black, styles 1 or 2.

Pomes

maroon to purple-black, obovoid to elliptic-obovoid, 9–12 × 9–10 mm, slightly shiny, glaucous, sometimes sparsely villous;

sepals flat, margins glabrous, sparsely villous;

navel slightly open;

style remnants 9/10 from base.

Pyrenes

1 or 2.

Cotoneaster transens

Phenology Flowering Jun; fruiting Oct–Nov.
Habitat Thickets
Elevation 0–50 m (0–200 ft)
Distribution
from FNA
WA; Asia (China) [Introduced in North America; introduced also in Europe]
[BONAP county map]
Discussion

L. Lingdi and A. R. Brach (2003) synonymized Cotoneaster transens with C. glaucophyllus Franchet (as C. glaucophyllus var. glaucophyllus). Cotoneaster transens is a deciduous species with purple-black pomes and is not closely related to C. glaucophyllus, an evergreen species with smaller leaves, smaller red pomes, and smaller flowers, among other differences.

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

Source FNA vol. 9, p. 457.
Parent taxa Rosaceae > subfam. Amygdaloideae > tribe Maleae > Cotoneaster
Sibling taxa
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. sternianus, C. tengyuehensis, C. vestitus, C. villosulus, C. ×suecicus
Name authority G. Klotz: Wiss. Z. Friedrich-Schiller-Univ. Jena, Math.-Naturwiss. Reihe 17(3): 337, fig. 4. (1968)
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