Lasioideae is a subfamily of flowering plants in the family Araceae. It contains ten living genera: Anaphyllopsis, Anaphyllum, Cyrtosperma, Dracontioides, Dracontium, Lasia, Lasimorpha, Podolasia, Pycnospatha, and Urospatha. The subfamily also includes the extinct genus Keratospema described from Ypresian fossils recovered at the Eocene Okanagan Highlands Princeton Chert site.

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