Very robust, up to ± 1 m. tall. stems deeply furrowed. stock very stout, taproot deeply descending. Lvs on petioles 15-20 × (0·5)-1-2 cm.; sheaths broad, up to 8 cm. long, tapering to petiole, shortly bluntly ligulate. Lamina rigid, coriac., about oblong to deltoid in outline, (10)-15-(25) × (6)-12-(16) cm. Primary pinnae 5-10 pairs, (3)-4-6-(10) × 3-(8) cm., rather distant, but often overlapping; secondary pinnae deeply cut into narrow segs ± 25 × 1·5-2 mm., the cartilaginous margins extended into pungent tips ± 1-2 mm. long Umbels us. many, on long peduncles, compound, ± 5 cm. diam.; involucral bracts linear. Calyx-lobes triangular, subacute; petals reddish mauve to white. Fr. ± 6·5 mm. long; mericarps unequal, us. one with 5, the other with 3-4 well-developed wings.
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