The arums comprise the Family Araceae (including the numerous aroids subfamily): monocotyledonous flowering plants in which flowers are borne on a type of inflorescence called a spadix. The spadix is usually accompanied by, and sometimes partially enclosed in, a spathe or leaf-like hood. This family of 107 genera and over 3700 species is most diverse in the New World tropics, although also distributed in the Old World tropics and north temperate regions.

anthurium; calla lily; jack-in-the-pulpit; philodendron