sweet flags; sometimes placed in subfamily Acoraceae

Acorus is a genus of monocot flowering plants. This genus was once placed within the family Araceae (aroids), but more recent phylogenies place it in its own family Acoraceae and order Acorales, of which it is the sole genus of the oldest surviving line of monocots. The exact relationship of Acorus to other monocots, however, is still debated by scientitst.