The common arrowhead is also known as wapato or duck potatoes. This emergent aquatic plant has edible tubers but only if harvested from clean water sources. For further information see the link below:- Arrowhead (identification, distinguishing features, flowers, leaves, height, habitat & edible parts): https://www.ediblewildfood.com/arrowhead.aspxAs an FYI - at about the 1.40 minute mark I meant to say ethnobotanical! (I said ethnographic - oops!!! :) )#arrowhead #wapato #duckpotato