Stems very slender, flexible, finely striate, up to c. 5 dm. long; lamina narrow-oblong, up to 2 dm. long, on petiole up to c. 7 cm. long; pinnae (5)-10-(20) pairs, distant, up to ± 10 × 8 mm., rather abruptly cuneately narrowed to sessile or subsessile base, membr.; teeth sharp, fine, with short hair-process. Occ. pinnae deeply, irregularly lobed. Umbels small, compound, on slender peduncles up to c. 4 cm. long; primary rays almost filiform unequal, up to ± 3c m. long; involucral bracts narrow-linear, acuminate; secondary rays very short; umbellules not > 5 mm. diam. in fl.
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