ABSTRACT:
Orontium aquaticum, the sole species of the genus, is a highly distinctive aroid. Its closest relatives are probably the skunk cabbages, Symplocarpus and Lysichiton (Barab€! & Forget, 1987; Grayum, 1990), which also inhabit North Temperate freshwater wetlands (Krause, 1908; Huttleston, 1953).