Arum byzantinum is a species of flowering plant in the family Araceae. It was described in 1836.[1]
Arum byzantinum is a small tuberous herb that spreads clonally through horizontal rhizomatous tubers.[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.[1]
Within the genus Arum, it belongs to subgenus Arum, section Arum.[1] A. byzantinum is diploid, with a chromosome count of 2n = 28.[1]
The species should not be confused with Arum byzantinum Schott, a junior synonym of Arum concinnatum Schott. Although often sold as A. byzantinum in the horticultural trade, A. concinnatum is a more widespread, larger hexaploid species with large, yellow spadices.[1]