I had meant to consult Wildflowers of Tennessee by Jack B. Carman on the fogfruit. What I found was that Lippia lanceolata (Phyla lanceolata) likes moist open areas, blooms May-October, and is frequent throughout Tennessee. This is more widespread than the marked counties in the previous email, but that map is probably more specific to actual locations. Michael Lee Bierly, Nashville, Davidson County, TN