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 נ2 mm; 2n=20. Native of Eurasia, established as a weed here and there from N.S. and Me. to Pa. and O. June-Sept.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.

From Flora of Indiana (1940) by Charles C. Deam

 ......

Indiana Coefficient of Conservatism: C = null, non-native

Wetland Indicator Status: n/a

Diagnostic Traits: annual; leaves finely dissected, glabrous, lustrous; involuvral bracts usually none at base of inflorescence, but umbellets with bractlets on outer side; petals white; ovaries and fruits glabrous; styles very short; fruits prominently ribbed.