Arisaema serratum is a species of flowering plant in the arum family (Araceae).

Arisaema serratum can be distinguished by its shorter spathe blade, which declines over the tip of the mouth (as opposed to being held at a horizontal angle).

All parts of A. serratum contain needle-like calcium oxalate crystals, saponins, and coniine.

[3] Ingestion results in intense pain from the mouth to the throat, making it impossible to swallow.

Symptoms include diarrhea, vomiting, and respiratory paralysis; severe cases can be fatal.