Slender tufted herb up to ± 45 cm. tall including infl. Lvs few, 3-2-foliolate, or occ. reduced to terminal lflt (all forms may be found on a single plant). Sheaths thin, pale, ± 8 cm. × 10 mm., tapering to apex; stipules 0 or vestigial; petioles ± 7-8 cm. × 2 mm., keeled in lower part, flat in upper; internodes 0; primary pinnae 1 pair, approximate to terminal lflt, flat, striate, finely serrulate-crenulate, ± 8 cm. × 2 mm., abruptly narrowed to pungent point. Terminal lflt up to 10 cm. × 3 mm., sts with 1 short accessory pinnule. Stems of male plants slender, ribbed; lowest bracts sts empty; sheaths ± 3cm. long, thin, pale, tapering to narrow-linear, pungent, unequal stipules up to ± 5 mm. long. Lamina up to c. 7 cm. × 1 mm., pungent. Umbels rather distant, on very slender rays up to 2 cm. long; umbellules several. ± 3 mm. diam., on filiform rays ± 2 mm. long; fls minute. Stems of female plants stouter, up to 10 mm. diam. Bract-sheaths firmer, furrowed, rather broader; stipules often reduced to 1; lamina up to 10 cm. × 4 mm., midrib more evident, apex pungent. Umbels ± hidden by bracts, on short peduncles; umbellules few on short slender rays. Fr. narrow, ± 5 mm. long; mericarps with 3-5 narrowly winged ribs.
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