Description from Flora of China
Cotoneaster tumeticus Pojarkova.
Shrubs deciduous, to 1.8 m tall. Branchlets spreading, dark reddish brown, terete, robust, initially white pubescent, glabrous when old. Petiole 2–3 mm, gray pubescent; stipules persistent, subulate, reddish brown, margin pubescent; leaf blade oblong-elliptic, (1.3–)2–3 × (0.5–)1–1.8 cm, veins raised abaxially, abaxially sparsely gray tomentose, adaxially lucid, glabrous or slightly pubescent, base cuneate, apex usually obtuse. Corymbs 3–6(or 7)-flowered; rachis and pedicels white pubescent; bracts subulate. Pedicel 2–3(–4) mm. Flowers 9–10 mm in diam. Hypanthium campanulate, abaxially glabrous. Sepals dark red, triangular, glabrous or sparsely pubescent only apically, apex subacute. Petals spreading, white, suborbicular, 3.5–4 mm, glabrous, margin irregularly emarginate, base not or shortly clawed. Stamens 20. Ovary densely pubescent apically; styles 2, free, not exceeding stamens. Fruit dark red or purplish red, obovoid, 8–9 mm, with slightly glaucous bloom, glabrous, pyrenes 2(or 3). Fr. Sep.
Dry stony places, thickets. Nei Mongol [E Mongolia].