Description from Flora of China
Daphne mononectaria (Hayata) Halda.
Shrubs. Branches black-purple, long, slender, minutely rugulose, at first thinly strigose, soon glabrous. Leaves opposite, subopposite, or alternate, often on same shoot; petiole 2-3 mm; leaf blade green adaxially, paler abaxially, ovate to broadly lanceolate, 2.5-5 × 1-2 cm, membranous or papery, abaxially soft white strigose, adaxially glabrous except sometimes for midrib, base cuneate, apex acute to obtuse and minutely apiculate; lateral veins 10 or 11 per side of midrib, slender, at narrow angle to midrib. Inflorescences terminal, racemose, ca. 4 cm, often 6-8-flowered, glabrous. Calyx reddish purple; tube terete, long and narrow, ca. 15 × 1 mm, exterior glabrous; lobes 4, ovate, ca. 2 × 1.5 mm, apex rounded. Stamens 8, lower whorl inserted at middle of calyx tube, upper whorl below throat. Disk scale 1, linear, ca. 2 mm. Ovary obconic, stipitate, glabrous. Drupe reddish, curved-ovoid, ca. 5 × 4 mm, acuminate.