"Freely branched, 2–7 dm; lvs shining, broadly deltoid, twice or thrice pinnately dissected into narrow acute segments; umbels 2–5 cm wide; rays 10–20; pedicels numerous, 1–5 mm; fr rather acute, 3 × 2 mm; 2n=20. Native of Eurasia, established as a weed here and there from N.S. and Me. to Pa. and O. June–Sept."
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