Rhizomes pale brown. Leaves: blade 2-pinnate with pinnatifid leaflets to 3-pinnate, occasionally 2-ternate; leaflets short-to long-petiolulate, blade ovate, deeply lobed or incised, margins sharply serrate. Inflorescences 2-3-flowered, often longer than leaves at anthesis, 8-12 cm, elongating to 35 cm in fruit. Flowers nodding; sepals reflexed and ascending, linear-lanceolate, 6-11(-15)× 0.3-1 mm; petals linear-lanceolate, nectary nearly basal, blade flattened, narrowly ligulate at apex; stamens 9-15. Follicles 6-10; stipe equal to or slightly longer than body; body oblong, 7-10 mm; beak recurved, less than 1mm. Seeds 1.8-2.2 mm. 2 n =18.
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