Shrubs or trees, deciduous, 2.5–8 m tall. Bark gray; old branches yellow-gray. Leaves with petiole green, 2.5–8 cm, glabrous; leaf blade 6–15 × 5.5–15.5 cm, thinly papery, veins palmate, 5–7(–9), conspicuous on both surfaces, slightly 5–7 (–9)-lobed, lobes near base smaller, glabrous, base truncate to shallow cordate, margin entire or dentate, apex acuminate to caudate. Staminate inflorescence 5–30 cm, densely pubescent. Staminate flowers: calyx tube obconical, calyx lobes triangular; petals oblong-lanceolate, ca. 1.8 mm; stamens alternate petals; filaments ca. 0.5 mm, glabrous; anthers oblong, ca. 1.5 mm; disk pulvinate, circular; pedicel ca. 2 mm, slender, sparsely pubescent, subtended by two bracteoles; bracteoles narrowly lanceolate, 0.3–1.3 mm. Carpellate inflorescence usually to 35 cm. Carpellate flowers: calyx of carpellate flowers bell-shaped, glabrous; teeth of calyx lanceolate, ciliate at apex; floral disk inconspicuous, flat; ovary obovoid, locules 3. Fruit ovoid, ca. 4 mm in diam. Fl. Apr, fr. Jun. 2n = 24*.
Home