This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Bitter-buttons. Tanacetum vulgare.
Composite Family. July - Sept.
Found in roadsides, waste places and around old buildings. Introduced from Europe.
Nova Scotia to North Carolina and Missouri, west to Minnesota.
Yellow, in rather flat clusters terminating stem, l 1/2 - 3 feet tall.
Deeply cut into narrow, toothed divisions, aromatic.

Tansy.
 
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