This section is from the book "How To Know The Wild Flowers", by Frances Theodora (William Starr Dana). Also available from Amazon: How To Know The Wild Flowers.
Two to seven feet high. Stem. - Smooth, branching. Leaves. - The lower divided into lobed leaflets, the upper irregularly three to five-parted. Flower-heads. - Yellow, rather large, composed of both ray and disk-flowers, the former drooping and yellow, the later dull greenish and arranged on a columnar receptacle.
This graceful, showy flower is even more decorative than the black-eyed Susan. Its drooping yellow rays are from one to two inches long. It may be found throughout the summer in the low thickets which border the swamps and meadows.
 
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