This section is from the book "Harper's Guide To Wild Flowers", by Caroline A. Creevey. Also available from Amazon: Harper's Guide To Wild Flowers.
A common species covering barren fields, and one of the least pretty. It is low, from 6 inches to 2 feet high. Stem, simple, rough, covered with a gray down which is also found on the leaves. Flowers, in a heavy, 1-sided compound panicle. Leaves, long-petioled below, crenately toothed; the upper much smaller. July to November.
Dry soil in open fields or along roadsides, in waste places.