The yellow-green disk at the center of the flowers is a distinguishing mark for sneezeweed. Purple-headed sneezeweed flowers have dark, reddish-purple disks.
- Family: aster (Asteraceae)
- Habitat: wet meadows, thickets, swamps
- Height: 2-5 feet
- Flower size: heads 1-1/2 inches across
- Flower color: yellow
- Flowering time: August to November
- Origin: native