Geum vernum (Raf.) Torr. & A. Gray. Engl.: heart-leaf avens, spring avens. Bot. syn.: Stylypus vernus Raf.
Classic texts: Rafinesque 1828-1830.
Henriette's herbal is one of the oldest and largest herbal medicine sites on the net. It's been online since 1995, and is run by Henriette Kress, a herbalist in Helsinki, Finland.