Shrub or small tree 1–8 m. tall, not or sparsely branched; branches glabrous, mostly hollow, usually becoming corky.. Leaf-blades elliptic, elliptic-obovate or elliptic-oblanceolate, 17–43 cm. long, 6.5–20 cm. wide, acuminate at the apex, very gradually attenuated into the petiole at the base, glabrous or venation puberulous beneath; petiole 1.6–5 cm. long; stipules deciduous, ovate-triangular, 0.6–2.3 cm. long, up to 1.5(–2) cm. wide, often leafy and bent back.. Flowers 4–6-merous, heterostylous, in umbels of 3–7 capitula, the capitula 4–9 mm. in diameter, 16–35-or more flowered; common peduncles 1.8–15 cm. long, glabrous or puberulous; secondary peduncles 0.4–1.5 cm. long, glabrous or puberulous; bracts mostly small or 0.5–1 cm. long.. Calyx cupular, ± 1 mm. long, not lobed.. Corolla white or pale yellow; tube (3–)3.75–4.25 mm. long; lobes elliptic, 1.5–2 mm. long, 1–1.1 mm. wide, thickened at the apex; throat densely hairy.. Ovary 2-locular; style 1.5 or 4 mm. long; stigma 1 mm. long.. Syncarps succulent, subglobose, 1–1.5 cm. in diameter; pyrenes flattened obovoid, 2.2–3 mm. long, 1.5–1.8 mm. wide.. Seeds olive, oblong or elliptic, flattened, 2 mm. long, 0.75 mm. wide, ± winged at the base, the wing ± ovate, ± 0.5 mm. long.
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