Bidens polylepis
A common plant of roadsides and upland forest openings with distinctive phyllaries.
A pseudanthium on the south side of Monroe Lake, 9/6/03.
A pseudanthium, showing phyllaries, 9/6/03.
An upper cauline leaf on the south side of Monroe Lake, 9/6/03.
Abaxial view of a leaflet on the S side of Monroe Lake, 9/6/03