The meadows in my area are starting to go brown. There are numbers of asters flowering – white and blue asters (Symphyotrichum species), and New England Aster (same genus). These are seeds and floss of a tall aster or other composite that bloomed earlier in the season. As walk through the meadow, they look like bright cotton balls. As you get closer, you see the mass of fine floss and the seeds:
A fall leaf provided the background color.