It was once cultivated for food by Native Americans as part of the group of crops known as the Eastern Agricultural Complex .
Polygonum erectum is a North American species of annual plant species in the buckwheat family , with upright or ascending stems , called erect knotweed .
Polygonum erectum was once cultivated for food by Native Americans as part of the group of crops known as the Eastern Agricultural Complex .
Polygonum erectum is a North American species of annual plant species in the buckwheat family , with upright or ascending stems , called erect knotweed .