The duckweed (Lemna turionifera) and two species of nonvascular aquatic liverworts, Ricciocarpus natans & Riccia fluitans. Ricciocarpus natans has a lobed, dorsi-ventrally flattened thallus bearing numerous elongate scales on the underside. This liverwort floats on the surface of quiet streams and ponds. Riccia fluitans has a dichotomously branched thallus forming interconnected chains. The elongated lobes are only about one millimeter wide. Massive submersed colonies of this minute plant are a haven for small aquatic insect larvae. [Photographed with hand-held Sony digital camera!]