Arum byzantinum is a species of flowering plant in the family Araceae.

[1] Flowering takes place from late May to early June; flowers are borne on a spadix that produces an unpleasant smell.

[1] Spadices are 4.5–10 centimetres long and have club-shaped, purple appendices.

[1] The species is endemic to northwest Turkey, where it grows in deciduous woodland, hedgerows, and damp areas.

Although often sold as A. byzantinum in the horticultural trade, A. concinnatum is a more widespread, larger hexaploid species with large, yellow spadices.