The Families of Flowering Plants L. Watson and M. J. Dallwitz Araceae Juss. Excluding Lemnaceae Habit and leaf form . Normal' plants . Leaves when hydrophytic, submerged, or emergent. Leaf sheaths with free margins.
Leaves ligulate, or eligulate.
Axillary scales present, or absent. General anatomy . Plants without silica bodies. Accumulated starch other than exclusively 'pteridophyte type'. Leaf anatomy .