Carnivorous aquatic plant trapping small organisms in its tiny bladders. The trap door operates at speeds that rank among the fastest plant movements known. Triggered by protruding hairs on the door, trap bladders open in about 0.5 milliseconds, sucking the animal in. Flowers are bright yellow with orange stripping. American Bladderwort (Utricularia vulgaris ssp. macrorhiza) found at the Mer Bleue Conservation Area, Ottawa, Ontario, Canada. Ramsar site no. 755.
''Utricularia vulgaris'' is an aquatic species of bladderwort found in Asia and Europe. The plant is a free-floating and does not put down roots. Stems can attain lengths of over one metre in a single growing season, but die back and form turions in winter. The leaves are finely pinnately divided, between one and eight centimetres long and carry many bladder-like traps. The yellow flowers are borne on stalks above the surface of the water between April and August. In eastern Asia and North America,.. more