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Description:
Andromonoecious shrubs or small trees to 7m tall. Leaves (25–)35–100 cm long; leaflets 11–17, papyraceous, elliptic-ovate to nearly oblong, the lateral ones often oblique, (6–)8–23 × (2.5–)3–11 cm, the apex acuminate (occasionally shortly so), the margin entire to irregularly undulate, slightly thickened and often minutely revolute, the base rounded or truncate to subcordate, often somewhat oblique; petiolules slender, 6–25(–30) mm long; rachis enlarged but not evidently articulated at petiolule bases; petiole slender, 8–20 cm long, clasping at the base and alate for 2.5–8 cm with narrow, membranous wings. Inflorescence terminal, erect, glabrous throughout, the primary axis short (perhaps to 20 cm long), the secondary axes several (3–7?), generally aggregated in loose whorls, 18–35 cm long, each subtended by an early caducous bract, the tertiary axes (peduncles) 18–25 per secondary axis, usually borne together in groups to form several pseudoverticils and a terminal umbel, each (15–)30–80 mm long, subtended by a linear-lanceolate, eventually caducous bractlet 5–10mm long, and bearing a terminal umbellule of 5–11 hermaphroditic (or occasionally some functionally staminate), protandrous flowers and often 1–2(–4) laterally disposed flowers (or rarely the axis branched again to form 2–4 fourth-order umbellules), the pedicels very slender, filiform, 7–15 mm long at anthesis, expanding in fruit to 20(–25) mm long. Calyx very broadly cupuliform, shallow, 0.2–0.5 mm high, the rim undulate and irregularly 5-denticulate, hyaline. Corolla oblong-elliptic and dark purple in bud, the petals 5, ovate-lanceolate, 2.5–3.5 mm long (smaller in staminate flowers). Stamens ascending at anthesis, the filaments slender, less than 0.5 mm long, the anthers 1.3–1.7mm long (smaller in staminate flowers). Ovary 2-carpellate (vestigial in staminate flowers), weakly oblate or orbicular to widely ovate, 1.5–2.5 mm high at anthesis; styles 2, free nearly to the base, erect and appressed at anthesis, diverging as they become receptive, then recurving strongly and expanding in fruit to 1.5 mm long. Mature fruit laterally compressed, oblate to orbicular or ovate-orbicular, 6–7 mm high, 6–7.5 mm wide, the conspicuous nerves often tinged reddish to purple, the base rounded to subcordate.
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