Will Watson / Greater duckweed (Spirodela polyrhiza) fronds up to 1 cm, Least duckweed (Lemna minuta) fronds elliptic, Common duckweed (Lemna minor) fronds ovate, Ivy-leaved duckweed (Lemna trisulca) fronds narrow...
01651222
Linda Pitkin / Greater duckweed (Spirodela polyrhiza), in pond. Crystal Palace Park, Kent, England, July.
