Oenanthe aquatica (L.) Lam.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Apiaceae
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Scientific Name
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Description
Species Description - Stem decumbent or floating; lvs decompound; lfls of submersed lvs filiform, of aerial lvs ovate, 1–2 cm, deeply pinnatifid into obtuse segments; fr ovate-oblong, 4–5 mm, tipped by the sep and ascending styles; 2n=22. Aquatic; native of Eurasia, adventive at Washington, D.C., in O., and doubtless elsewhere in our range.