Description from Flora of China
Morus alba Linnaeus var. serrata (Roxburgh) Bureau; M. gyirongensis S. S. Chang; M. pabularia Decaisne.
Trees to 15 m tall. Branchlets densely pubescent. Stipules lanceolate-ovate, 1.5-2 cm. Petiole 4-6 cm, densely white pubescent; leaf blade broadly ovate, unlobed, 10-14 × 6-10 cm, abaxially densely white pubescent along midvein and basal lateral veins, adaxially glabrous, base cordate, margin toothed with teeth triangular and apically shortly acuminate, apex acuminate to caudate; basal lateral veins 2, extending to basal half. Female inflorescences axillary, single; peduncle 0.5-1.5 cm. Female flowers: calyx lobes ovate-orbicular, adaxially pubescent; style absent; stigmas without mastoidlike protuberance, 2-branched, pubescent. Syncarp red when mature, shortly cylindric. Achenes ovoid, ± compressed, glabrous. Fl. and fr. May-Jun.
Mountain forests; ca. 2300 m. S Xizang (Gyirong) [NW India, Nepal].