USWildflowers Daily Plant 12/12/2012

Photo from 6/18/2005. Location: Great Smoky Mountains National Park

Yes, the blossom looks like a Daisy (Leucanthemum vulgare), which is how I originally identified it back in 2005.  However, it is Mayweed, an introduced and possibly invasive species.  For more  information go to the Anthemis cotula detail page.

Mayweed, Stinking Chamomile – Anthemis cotula

Also Daily Plant 11/08/2010, 12/12/2011