Alumroot Heuchera americana
The alumroot is a perennial found in woods
and on shaded rocks. It must be grown in a
location where it will receive sun only in the
cool hours of the day. Its leaves are toothed
and round with a heart-shaped base, and its
small flowers are greenish white in color. It
was used by the Cherokee, Chickasaw,
Choctaw, Creek, Menominee, and
Meskwaki Native Americans, and it is still
used today. A tea made of its leaves is used
to treat diarrhea, dysentery, and piles and
can be gargled for sore throats. The root
can be made into a poultice to put on
wounds, sores, and abrasions.
http://theplantencyclopedia.org/wiki/Heuchera
http://www.altmd.com/Articles/Alum-Root-Herbal-Remedies
http://www.herbalextractsplus.com/alum-root.cfm