Oxycoccos palustris Persoon; O. quadripetalus Gilibert; O. vulgaris Hill.

Shrubs evergreen, 10–15 cm tall, sparsely branched, ± procumbent; rhizomes to 80 cm. Twigs terete, slender, puberulous, glabrescent; bud scales inconspicuous. Leaves quite dense; petiole ca. 1 mm; leaf blade dark green adaxially, oblong or ovate, 5–11 × 2–5 mm, leathery, glabrous, abaxially glaucous, secondary veins inconspicuous on both surfaces, base rounded, margin strongly revolute, entire, without basal glands, apex acute to apiculate. Inflorescences terminal umbellate racemes, axis to 7 mm, flowers sometimes axillary at base of innovation, (1- or)2–4-flowered; bracts persistent, ovate, ca. 2 mm, glabrous. Pedicel recurved at apex, filiform, 1–2(–3) cm, pubescent; bracteoles at middle. Flowers 4-merous. Hypanthium glabrous; calyx lobes suborbicular, ca. 0.5 mm. Corolla pinkish, glabrous, lobed nearly to base; lobes reflexed, oblong, 4–6 mm. Filaments ca. 1.5 mm, ciliolate; anthers ca. 3 mm, thecae without spurs; tubules shorter than thecae. Berry 4-loculed, red, ca. 1 cm in diam. Fl. Jun–Jul, fr. Jul–Aug. 2n = 48, (46, 52, 68, 70), 72.

Moors, marshy places; 500–900 m. Heilongjiang, S Jilin (Changbai Shan) [Japan, SE Russia; Europe, North America].