American bistort

''Bistorta bistortoides'' is a perennial herb in the buckwheat and knotweed family Polygonaceae. The species name remains unresolved.

''Bistorta bistortoides'' is distributed throughout the Mountain West in North America from Alaska and British Columbia south into California and east into the Rocky Mountains.

''Bistorta bistortoides'' grows from foothills to above the timberline, although plants growing above 7,500 feet are smaller and seldom reach more than 12 inches in height... more