You have identified:

Canadian Goldenrod
(Solidago canadensis)

© Daniel Reed,  www.2bnthewild.com

General Information: A member of the Composite family, it is the most common goldenrod found along roadsides and in fields.  Stems produce numerous lance-shaped, three-veined leaves that are sharply toothed.  The main stem is smooth at the base but hairy below the lower flower branches.  Flowers are in a broad, triangular panicle and are yellow.  Stems are usually 1’ to 5’ high and bloom in July through September.
 

• Medicinal Significance
• Economic Uses

Gleason, H. A.  1952.  The New Britton and Brown Illustrated Flora of the Northeastern United States and Adjacent Canada.  3 vols.  New York: Hafner Press.

Newcomb, L.  1977.  Newcomb's Wildflower Guide.  Boston: Little, Brown, and Company.