Medium-sized herb; base irregular, 0.5-2.0 cm. long, 1.0-1.5 cm. wide. Leaves 2.5-35.0 cm. long, repeatedly bifurcated or rarely 3-6 times pinnate; lateral lobes 3-6 times bifurcated or rarely pinnate, 0.5-10.0 cm. long, ascending at an angle of 30-600, the ultimate divisions 0.5-12.0 mm. long, narrow, obtuse or acute, nerveless or very rarely nerved; petiole 1-8 cm. long, flattened, membranaceously widened at the base, with a distinct, sometimes very irregular ligule 2-3 mm. long and 5 mm. wide. Flowers solitary or in fascicles between the leaf bases; pedicel 1.0-1.5 cm. long, thickened into a disc at the tip; young spathe acute, 0.5-1.0 cm. long, the older tubular or infundibuliform, 0.5-1.0 cm. long; tepals 5-8, triangular, acute or acuminate, about 1 mm. long; stamens 5-8, 3.5-5.5 mm. long, the fila-ment lanceolate, scaphiform at the base, sometimes slightly united, 3-4 mm. long, the anthers obtuse, about 1 mm. long; pollen nearly globose, about 18 X 15 j, the lobes very wide at one pole and tapering toward the other; ovary ellipsoid, acute, base attenuate, flattened, distinctly 8-ribbed, 3.0-4.5 mm. long, 1.0-1.5 mm. wide; styles flattened or subulate, acute or emarginate, 1.0-2.5 mm. long. Fruit dehiscing with 2 equal, 5-ribbed valves.
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