Tick-seed Sunflower
Bidens polylepisAsteraceae — Aster family
Invasive native
![Tick-seed Sunflower](/images/bidens_polylepis.jpg)
Lums Pond State Park
September 2001
![Tick-seed Sunflower](/images/bidens_aristosa.jpg)
Lums Pond State Park
November 2003
Guide to Bidens of Delaware
Search Google • Delaware • USDA
Photos copyright David G. Smith
Information from the Delaware Flora Checklist used with author's permission.