no photo — written note
Plants
Feathery whorled leaves forming dense surface mats that choke boat lanes.
Field facts
HabitatLakes, reservoirs, slow rivers
RangeStatewide
When to lookGrowing May to October
StatusInvasive in Indiana (Indiana DNR / IUCN Red List)
Look-alikesNorthern Watermilfoil — native, Coontail
Field note: Twelve or more leaflet pairs per leaf usually means the invasive species.
Lesson
Watching responsibly
Clean, drain and dry boats every time; a fragment starts a new infestation.
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