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Description:
Dioecious (but with “sexually inconstancy” in some individuals) trees (0.7) 1–2.5 (–4) m tall, monocaulous or sparsely branched. Leaves once-pinnate, 23–47 (–82) cm long; main leaflets 9–17, but frequently with several additional, subsidiary leaflets, lamina medium to olive green, dull to very shiny above, paler below, membranous to slightly coriaceous, narrowly to widely ovate elliptic, 4–10 (–11) × 1.5–5 (–6) cm, the apex rounded to acute to acuminate, the margin subentire to strongly dentate, thickened and slightly revolute, the base often asymmetrical and/or pleated, rounded to obtuse or slightly cordate (rarely truncate); petiolules 4–20 (–30) mm long; rachis articulated at insertion of leaflets, glabrous; petiole (7–) 8–21 (–29) cm long, 2.5–5.0 mm diam., glabrous, without an alate base. Inflorescence a panicle of capitula (or umbellules with very short pedicels), terminal, erect, pyramidal to oblong, the axes glabrous to densely puberulent; the bractlets caducous, linear to triangular, 3–8 mm long; the primary axis (7–) 13–22 (–28) cm long; the secondary axes (8–) 10–21, scattered, (6–) 10–29 (–33) cm long; the tertiary axes (14–) 20–48 (–61) per secondary axis, (2.5–) 4–11 (–17) mm long; scattered or in clusters of two or three, terminating in capitula (or umbellules) of 5–8 (–14) flowers (with no subtending lateral flowers); flowers subtended by a narrowly triangular (and often scarious-ciliate) bractlet 0.5–1.0 mm long; pedicels lacking (or up to 0.5 mm long and articulated below the ovary). Calyx collar-like, 0.5–1.0 mm tall, rim with small apiculate teeth (sometimes with shallowly triangular lobes in staminate flowers). Corolla in bud oblong to conical (or hemispheric); the petals 5, spreading to recurved at anthesis, cream white, narrowly triangular, 2.2–3.5 × 1.0.–1.5 mm. Stamens of staminate flowers ascending to spreading at anthesis, filaments ca. 1 mm long, anthers ca. 3.0–3.5 mm long; stamens present in pistillate flowers, but smaller (filaments ca. 0.7 mm; anthers ca. 2 mm). Ovary 2-carpellate, orbicular to elliptic to obovate, 4–5 mm tall at anthesis in pistillate flowers; ovary of staminate flowers vestigial, obconic; styles 2, free or fused only at the very base (fused portion usually obscured by calyx rim), 1.0–2.0 mm long, erect when receptive and ascending to spreading (or recurved) in fruit (styles vestigial in staminate flowers, <1.0 mm long). Mature fruit laterally compressed, medium to olive green, circular or elliptic to slightly obovate, 3.5–5 (–7) × 3.5–5 mm, glabrous, the base rounded or slightly cordate or narrowed to form a small stipe (<1 mm long), the ribs weakly developed when dry.
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