pistia: pantropical floating plant forming a rosette of wedge-shaped leaves; a widespread weed in rivers and lakes
aquatic plant: a plant that grows partly or wholly in water whether rooted in the mud, as a lotus, or floating without anchorage, as the water hyacinth
bill of particulars: the particular events to be dealt with in a criminal trial; advises the defendant and the court of the facts the defendant will be required to meet