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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).

Calla palustris is an aquatic plant. This plant grows six inches tall.

Habit and Detached Inflorescence of Calla Palustris

Calla palustris is an aquatic plant. This plant grows six inches tall.

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.

"Calla palustris; 1. a flower; 2. a section of the ovary; 3. a perpendicular section of the ripe fruit; 4. a seed; 5. its longitudinal section." -Lindley, 1853

Marsh Calla

"Calla palustris; 1. a flower; 2. a section of the ovary; 3. a perpendicular section of the ripe fruit;…