Cotoneaster glomerulatus W. W. Sm.

Further study is necessary to determine the identity of Cotoneaster tengyuehensis J. Fryer & B. Hylmö, which might be synonymous with this taxon.

Shrubs deciduous, to 3 m tall. Branchlets grayish brown or blackish brown, terete, initially densely yellow tomentose-villous, gradually glabrescent. Petiole 2–3 mm, yellow tomentose; stipules brown, lanceolate, nearly as long as petioles, sparsely villous; leaf blade ovate-lanceolate to oblong-ovate, 4–5 × 2–2.5 cm, lateral veins 4 or 5 pairs, slightly impressed adaxially, abaxially sparsely yellow tomentose, adaxially glabrous or puberulous, base broadly cuneate to rounded, apex acute, rarely acuminate or ± obtuse. Corymbs 1.5–2.5 cm, 3–11-flowered; rachis and pedicels densely yellow tomentose-villous; bracts linear or linear-lanceolate, 1–3 mm, slightly yellow villous. Pedicel very short, 1–2 mm. Flowers 6–7 mm in diam. Hypanthium campanulate, abaxially yellow villous. Sepals triangular, 1–1.5 × 1.5–2.5 mm, apex acute. Petals erect, white, stained reddish, suborbicular, 3–3.5 mm and ca. as broad, base clawed, apex obtuse. Stamens ca. 20. Ovary yellowish pilose apically; styles 5, free, not exceeding stamens. Fruit bright red, subglobose, ca. 5 mm in diam., pyrenes 5. Fl. May–Jun, fr. Sep–Oct. 2n = 68*.

Shrubs deciduous, erect, 2–3 m tall. Branchlets grayish brown to reddish brown, terete, slender, initially densely yellow pubescent, gradually glabrescent. Petiole 3–5 mm, pubescent; stipules reddish, lanceolate, 3–5 mm, initially sparsely pubescent, glabrescent; leaf blade elliptic-lanceolate, 4–6.5(–8) × 1.5–2.5(–3) cm, veins raised abaxially and impressed adaxially, abaxially pubescent, more densely so along veins, adaxially glabrous, base cuneate, apex acuminate. Corymbs 1.5–2.5 cm, 3–9-flowered; rachis and pedicels pubescent; bracts reddish, linear-lanceolate, 3–4 mm, puberulous. Pedicel 1–3 mm, pubescent. Flowers nodding, 5–6 mm in diam. Hypanthium campanulate, abaxially pubescent. Sepals triangular, 1.5–2 × 1.5–2 mm, apex acute. Petals erect, red basally, white apically, suborbicular or elliptic, 3–4 mm, base clawed, apex obtuse and whitish. Stamens 16–18, shorter than petals. Ovary with pubescent apex; styles 2, free, not exceeding stamens. Fruit crimson, subglobose, 5–6 mm in diam., glabrous, pyrenes often 2. Fl. May–Jun, fr. Aug–Sep.

W Yunnan.

Sichuan, Yunnan.

Slopes, river valleys, sparse forests, open scrub; 2000--2600 m.

Open thickets by streams, mixed forests; 2000--3000 m.