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Two plants of the Arum family: left, arrow arum (Peltandra virginica); right, water arum (Calla palustris).

P. Virginica and C. Palustris

Two plants of the Arum family: left, arrow arum (Peltandra virginica); right, water arum (Calla palustris).

The common name of calla palustris is water arum. It is a perennial, aquatic plant.

Calla Palustris

The common name of calla palustris is water arum. It is a perennial, aquatic plant.