Lyre-Leaved or Lyreleaf Sage [Salvia lyrata] was quite prevalent along our hike on the Blue Ridge Parkway Shut-In trail on 25 May 2013. It’s a member of the Mint (Lamiaceae) and, yes, it’s stem is square. Newcomb’s Wildflower Guide, pages 94-95, says it can be found in dry open woods in Spring and Early Summer.
USDA Plants Listing: https://plants.usda.gov/home/plantProfile?symbol=SALY2
Lyreleaf Sage on the Shut-In Trail – 25 May 2013
Lyreleaf Sage (height-wise) – 25 May 2013
