This section is from the book "Who's Who Among The Wild Flowers", by W. I. Beecroft. Also available from Amazon: A Field Guide to Edible Wild Plants.
Green Arrow Arum.
Peltandra virginica. Arum Family. May - June.
A plant 1 - 3 feet high. Found growing in clumps in shallow water. Maine to Florida, west to Michigan and Missouri.
Small, borne on club within a fleshy sheath; outer surface of sheath green. Berries green in close cluster.
Rich green, large, shaped like an arrowhead.

Arrow Arum.
 
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