Deciduous, clump forming geophyte. Roots fibrous, ca. 1 mm in diameter, terminating in a small fusiform tuber, ca. 15 x 5 mm. Leaves in basal rosette, suberect, dead at time of flowering, 150-280 x 40-60 mm, 3-ternate; rachis and pinnae straight, flattened, articulate, margins and midrib prominently thickened; base sheathing, persistent, form a fibrous mass around the base of the plant. Ultimate leaflets entire to 3-sect, articulate; segments very narrowly elliptic to lorate, 10-40 mm × 1.5-2 mm, concolorous, glabrous; margins and midrib prominently thickened; pungent. Synflorescences 0.5-0.9 m long, with terminal primary umbel subtended by 6 to 14 slightly smaller, secondary and tertiary umbels; peduncle brownish, glabrous, nodes subtended by foliose to simple, lanceolate peduncular bracts. Umbels compound, obtriangular in outline; involucral bracts 3 to 5, 5-10 mm long, lanceolate, acuminate, glabrous; rays 2 or 3 (4), 70-140 mm long, equal, suberect, glabrous; involucel bracts 4 to 6, 3-4 mm long, lanceolate, acuminate, glabrous, raylets 9 to 16, glabrous, 4-6 mm long. Flowers hermaphroditic in terminal, secondary and tertiary umbels; calyx lobes 5, acute; petals 5, yellow, broadly ovate to broadly elliptic, acuminate with tips inflexed, glabrous, resin duct conspicuously branched, lateral branches 2 to 5, arising from near the base of the central duct; stamens 5, with anthers inflexed; ovary bilocular, glabrous; stylopodium conical; styles suberect to spreading. Fruits isodiametric, narrowly elliptic in dorsal view, 4.5-5.0 mm × 2.0 mm; mericarps homomorphic, glabrous, immaculate when dry; median and lateral ribs 3, equal, filiform; marginal ribs 2, prominent; commissural vittae 2; vallecular vittae 4; commissure narrow; carpophore bipartite; druse crystals present, scattered throughout mesocarp.
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