Willem Kolvoort / Water filled ditch with shadow of a tree on water with Fringed waterlily (Nymphoides peltata) Star duckweed (Lemna trisulca) Netherlands. July 2015. Commended in the Underwater World Category of the G...

Claudio Contreras / Canal between chinampas, a wetland agricultural system, with Fat Duckweed (Lemna gibba), Xochimilco wetlands, Mexico City, October

Claudio Contreras / Men paddling through canal with Fat Duckweed (Lemna gibba) between chinampas, a wetland agricultural system. Xochimilco wetlands, Mexico City, October

Will Watson / Circular mass of Duckweed (Lemna minor) formed as a consequence of vegetative/asexual reproduction located on a pond, Herefordshire, England.

Willem Kolvoort / Common Duckweed (Lemna minor) in brook in central Holland. August.

Will Watson / Red algae (Rhodophyta) and Least Duckweed (Lemna minuta) on Radnorshire pond, Powys, Wales, UK, May.

Paul Harcourt Davies / Common / Lesser duckweed (Lemna minor) on pond water, Italy

Wild Wonders of Europe / della Ferrera / Common duckweed (Lemna minor) covering a water channel at dusk, riparian forest mainly consisting of Willow trees (Salix sp) Lonjsko Polje Nature Park, Sisack-Moslavina county, Slavonia region, Posavi...

Oriol Alamany / Iberian Green / Western Marsh Frog (Rana perezi) in pond with Common / Lesser Duckweed (Lemna minor), Ebro Delta Natural Park, Catalonia, Spain, September, Captive

GEORGETTE DOUWMA / Whooper swan (Cygnus cygnus) parent with juvenile feeding on Common Duckweed (Lemna minor) UK

GEORGETTE DOUWMA / Coot (Fulica atra) on pond covered with Common duckweed (Lemna minor) UK

Willem Kolvoort / Underside view of Lesser duckweed (Lemna minor) in a nutrient rich ditch near Lake Naarden, Holland