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General DescriptionTrees to 20 m tall. Trunk to 50 cm d.b.h.; bark gray-brown, scabrous. Young branches yellow-brown pubescent at first, soon glabrate, old ones conspicuously lenticellate. Buds shiny red-brown; scales 6-8, margin puberulous. Petiole 1-2.5 cm, sparsely villous; leaf blade pale green adaxially when old, 5-15 cm long, 2.5-7 cm wide, brown pubescent at first, later pubescent only along veins, lateral veins 6-9-paired, together with reticulate veins slightly prominent abaxially, concave adaxially. Male flowers: stamens ca. 1 cm, glabrous, filaments ca. 1 mm. Female flower: ovary ca. 1 cm, glabrous. Samara 2.5-3.5 cm long, 1-1.3 cm wide; stipe 2-5 mm, articulate at 1-3 mm pedicel. Seed 1.3-1.5 cm long, ca. 3 mm wide.