Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Learn more about Eurasian Water-milfoil from the Vascular Plants of North Carolina.
Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Saxifragales
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Chris Evans, Illinois Wildlife Action Plan, Bugwood.org bug_5330057
Stem diameter below inflorescence is up to 2x diameter of lower stem, per Weakley's Flora (2012).
Graves Lovell, Alabama Dept. of Conservation & Natural Resources, Bugwood.org bug_5400611
Leaves well-developed, pinnately divided with filiform segments, per Weakley's Flora (2012).
COMPARE aquatic plants
Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5447206
Flowers/fruits in erect spikes emersed from water, per Weakley's Flora (2012).