Japanese Mazus (Mazus pumilus)

D&M MD 9/2/11 (synonym M. japonicus, see plants.usda.gov)
http://plants.usda.gov/java/largeImage?imageID=mapu7_001_ahp.tif
http://www.missouriplants.com/Blueopp/Mazus_japonicus_page.html
http://www.delawarewildflowers.org/plant.php?id=1252&mode=C