Fine-leaved or Bitter Sneezeweed [Helenium amarum] photos were taken at Fletcher Park on 2 October 2016. It’s the member of the Aster (Asteraceae or Compositae) family. Newcomb’s Wildflower Guide, pages 366-367, states it blooms in summer and fall and can be found in fields and on roadsides. USDA Plants Listing: Helenium amarum
