Eupatorium serotinum Michaux
Asteraceae (Composite Sunflower) Family
The leaves are opposite on the stem, lance-like to widest at the middle. Leaf tip tapers to a long or short point, with the sides of the point being pinched in, setting it off abruptly from the lower portion of the leaf. The margins are toothed and the base is wedge-shaped, or somewhat squared.
Flowers are at the end of the stem in flat-topped clusters of heads; bisexual in nature and symmetrical in form. Disc flowers are grayish-white. Flowers occur in early autumn.
Fruit is a seed which outer layer is fused to it (achene).