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common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum

common European arum with lanceolate spathe and short purple spadix; emerges in early spring; source of a starch called arum

The fresh root is stimulant internally. Externally, it is very acrid. From the root of this Arum a starch is prepared, which is called Portland Island Sago, Gersa serpentariae, Cerussa serpentariae, Fecula ari maculati.