https://www.usgs.gov/media/images/chelone-glabra-2-white-turtlehead-howard-county-md-helen-lowe-metzman
White turtlehead. Chelone glabra. A good bumble bee plant and host for the Maryland State Butterfly, the Baltimore Checkerspot. Photo and specimen by Helen...
howard county mdchelone glabrawhite turtleheadhelen lowe