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Japanese Arisaema

Arisaema serratum

Also called Fuji Cobra Lily, Variegate Jack In The Pulpit

Arisaema serratum is a hardy Japanese woodland perennial grown from a tuber, valued for its striped hooded flowers and divided leaves. It needs cool, moist, shaded conditions and a rich, well-drained soil that stays evenly damp.

Family: Araceae (Arum family)
Grows as: Perennial
Light: Part shade, Shade
Water: Keep the soil consistently moist during the growing season and water less after the leaves fade in summer.
Soil: Rich, humus-heavy, well-drained woodland soil or leaf mould.
Temperature: 5–25 °C; hardy to about -20 °C when dormant.
How easy: Moderate
Safety: Toxic: All parts contain calcium oxalate crystals, saponins and coniine; the underground bulb is most concentrated, and contact with the juice causes inflammation, while ingestion causes intense mouth and throat pain, vomiting, diarrhea and possible respiratory paralysis.
Native range: Primorye to Korea, S. Kuril Is. to Japan
Climate: temperate

About

Arisaema serratum or Fuji cobra lily is a species of flowering plant in the arum family (Araceae). It is native to Japan, where it is found from the Kansai region north to the island of Hokkaido. Its natural habitat is damp forests.

Arisaema serratum is a perennial. It produces two leaves, with 7-13 leaflets each. The color of the flowering bract is variable, being either purple or green. It blooms from May to June.

Safety

All parts of A. serratum contain needle-like calcium oxalate crystals, saponins, and coniine. Toxicity is especially concentrated in the underground bulb; touching the juice causes inflammation. 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.

Other Arisaema plants

Florida Jack In The Pulpit · Amur Jack In The Pulpit · Arisaema attenuatum · Arisaema barnesii · Arisaema candidissimum · Arisaema ciliatum · Himalayan Cobra Lily · Arisaema decipiens · Green dragon · Arisaema erubescens · Arisaema fimbriatum · Yellow Cobra Lily

Text excerpted from the Wikipedia article Arisaema serratum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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