Description from Flora of China
Helwingia himalaica J. D. Hooker & Thomson ex C. B. Clarke f. omeiensis W. P. Fang, Acta Phytotax. Sin. 1: 169. 1951; H. omeiensis var. oblonga W. P. Fang & T. P. Soong.
Trees or shrubs, evergreen, 3–4(–8) m tall; bark not seen; young branches green. Leaf petiole 1–5 cm; stipules 2, linear-lanceolate or awnlike; leaf blade abaxially light green, with conspicuous yellow-brown streaks or speckles when dry, oblong or obovate-oblong, rarely oblanceolate, 9–15 × 3–5 cm, leathery, veins inconspicuous adaxially, base cuneate, margin glandular spiculate-serrate on apical 2/3, apex shortly acuminate or acuminate to caudate. Staminate umbels many, 5–20(–30)-flowered, on lower 1/3 of leaf; pedicels 3–7 mm. Carpellate umbels 1–4(–6)-flowered; pedicel ca. 2–4 mm. Staminate flowers 3–5-merous, purplish white. Carpellate flowers 3- or 4(or 5)-merous, green; stigma 3- or 4(or 5)-divided. Fruit subglobose to narrowly ellipsoid, ca. 9 mm. Seeds 3 or 4(or 5), lobes 3 or 4(or 5); pedicel 1–2 mm. Fl. Apr–May, fr. Jul–Aug.
Moist habitats in woods and on slopes; 600–1700 m. SE Gansu, N Guangxi, Guizhou, Hubei, Hunan, S Shaanxi, Sichuan, Yunnan.