Cut leaf toothwort, Dentaria laciniata family Brassicaceae A favoriete cooked green of the Cherokee it has an edible flower and edible root.   I have not used this plant much.  I like to munch on the flowers in the spring while fly casting for trout on Volinia creek. (More)
Right:  Cutleaf toothwort leaf.  Toothache root or also called pepper root,

 

Dentaria diphylla Michx.  Toothwort, also called Pepper Root. 

Edible root.

Medicinally used to treat toothache.  Chew the root.  The species, the root, was chewed for colds, flu.  A decoction or tea of the root was used to clear the throat of phlegm, for sore throats. Also, used as a gargle to treat hoarseness. The root was poulticed over the head and temples to treat headache