ZAMIA INTEGRIFOLIA - Coontie, Florida Arrowroot
This South Florida native is a cycad with palm-like leaves 2-3' long. The thick, under-grown, starchy stem is edible but the root is deadly poisonous unless it is first peeled, pounded, ground, boiled, mashed, washed with plenty of water, drained and dried. The run-off water is known to kill cattle.