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Scientific Name: Bidens laevis
•Leaves: coarsly serrated, opposite and sessile along central stem.
•Larger specimens often have branching stems; stems may appear dark red to purple.
•Flowers: Yellow, showy, usually about 8 petals; each petal has a green bract about the same size below it; flowers have a long stalk originating from base of leaf.
•Grows erect along shoreline, but can also form floating mats stretching out from the shoreline. Growth habit similar to Polygonum and Hydrolea.