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.
Lysimachia terrestris, Primrose Family. June - Aug.
Found in low, wet ground. Newfoundland to Northern Georgia, west to Minnesota, Arkansas and Manitoba.
Yellow, with reddish dots near the center, borne in elongated cluster terminating stem, 1 - 2 feet high.
Opposite, tapering at both ends.

Loosestrife.
 
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