Shrubs or small trees. Branchlets glabrous. Leaves clustered toward apex of branchlet, subverticillate or scattered; petiole 7-16 mm, glabrous; leaf blade elliptic, 4.5-8 × 2-3.5 cm, glabrous on both surfaces, triplinerved, lateral veins 4-6 pairs, lowermost pair arising 2-10 mm from base, other pairs arising from middle or below middle of blade, base cuneate or rotund, apex subcaudate-acuminate. Umbels 3-7-fascicled, axillary, 5-flowered; peduncle very short or lacking. Pedicel 2-3 mm, densely pubescent. Perianth segments 4, ovate. Male flowers: fertile stamens 6; filaments pubescent at base, of 3rd whorls each with 2 shortly stipitate rounded-cordate glands at base; rudimentary pistil ca. 1.5 mm, pubescent. Fruit ovoid, ca. 9 × 8 mm; fruiting pedicel 7-9 mm, slightly thickened at apex. Fl. Oct-Nov or Jan-Mar, fr. Oct-Nov.

The fresh leaves contain ca. 0.7% aromatic oil.

● Mixed forests in wet ditch sides, thickets on calcareous rock; 1200-2000 m. Xizang, Yunnan.