arrow arum, tuckahoe
Peltandra virginica

Hardiness: Zones 5 to 9
Plant type: Herbaceous perennial
Height: 1.5- 4ft
Spread: 1.5- 2ft
Sun:  Full sun to part shade; tolerates full shade
Water: Wet
Bloom time: April to June
Bloom color: White, green, yellow
Soil: Prefers mud, shallow water, adaptable

Other notes: Arrow arum is high in calcium oxylate which is toxic if consumed raw, but easily neutralized through cooking or drying.

More information on this plant here.