Philadelphia Fleabane - Erigeron philadelphicus
Also known as the Philadelphia Daisy.
Family: Sunflower Family (Compositae)
Aster Tribe: Astereae
Flowers: Flowerhead has "hundreds of fine filamentlike ray flowers."
Plants: 8-28 inches tall, biennial or short-lived perennial.
Leaves: Spatula-like, clasping.
Identified: by Lynn Fleming and Janet Wallace, and confirmed by consulting Kansas Wildflowers and Grasses
Photo: Courtesy of S. Peregrine Johnson.