pickerelweed[pik′ər əl wēd′]
☆ any of a genus (Pontederia) of North American aquatic plants of the pickerelweed family, esp. a species (P. cordata) with arrow-shaped leaves and spikes of blue-violet flowers, found in shallow waters
designating a family (Pontederiaceae, order Liliales) of monocotyledonous, freshwater plants, including the water hyacinth
A freshwater plant (Pontederia cordata) of eastern North America, having heart-shaped leaves with long petioles and spikes of violet-blue flowers.