三裂树参 san lie shu shen

Acer trifidum Thunberg in Murray, Syst. Veg., ed. 14, 912. 1784; Dendropanax japonicus (Junghun) Seemann; Gilibertia japonica (Junghun) Harms; G. trifida (Thunberg) Makino; Hedera japonica Junghun; Textoria japonica (Junghun) Miquel; T. trifida (Thunberg) Nakai ex Honda.

Trees, small, hermaphroditic or usually andromonoecious. Petiole (1.5-)3-13 cm; leaf blade often dimorphic, glandular punctate; unlobed blades ovate or elliptic to broadly ovate or subrhombic, (4.5-)7-12 × (2-)3.5-12(-17) cm, 3-veined at base, secondary veins raised on both surfaces; lobed blades (when present) shallowly 2- or 3-lobed on mature plants (more deeply 3-5-lobed on juveniles); leathery, base obtuse or broadly cuneate, margin entire, sometimes minutely revolute, apex acute to acuminate. Inflorescence terminal; umbels solitary or more often (2 or)3-5, usually 1 with bisexual flowers and others with later blooming male flowers; umbels 1.5-2 cm in diam., 10-20-flowered; peduncle 3-6 cm; pedicels 0.6-1.5 cm in flower and fruit. Calyx with 5 small teeth. Ovary 5-carpellate; styles 5, completely united, 0.75-1 mm. Fruit broadly ellipsoid to subglobose or slightly obloid, 4-8 × 3.5-7 mm, ribbed when dry; stylar column persistent, 1-1.5 mm; stigmas sessile.

Forests and thickets. Taiwan (Lan Yu) [Japan].