ssp: pussilum - Swamp Jack-in-the-pulpit
David G.Smith - delwarewildflowers.org

Lore: As in other Arums, Calcium oxalate crystals are found in the leaves, corms, and fruit of the Jack-in-the-pulpit. Meskwaki tribesman used freshly ground corms mixed in with meat as a toxic treat to their Sioux neighbors, who died painful deaths due to the caustic nature of the Calcium Oxylate. If eaten alone and raw, Jack -in-the-pulpit would have a peppery taste and burn the mouth, hence the name "marsh pepper". On the other hand many native tribes dried the corms in thin strips or ground it into a powder, and used it as an internal medicine for colds and bronchial irritations and as a poultice for external ailments such as aches and sores.