Possibly referring to River Orontes in Syria.
A single-species genus. For description see O. aquaticum.
1 species from E USA.
Division and seeds.
Rhizomes and boiled seeds are edible.
Aquatic plant with submerged, floating and emerging leaves, spathe bract-like, not reaching the fertile part of the spadix.
Source: (2005). Araceae. In: . Horticultural Flora of South-eastern Australia. Volume 5. Flowering plants. Monocotyledons. The identification of garden and cultivated plants. University of New South Wales Press.