| Noun | 1. | Pontederia cordata - American plant having spikes of blue flowers and growing in shallow water of streams and pondsgenus Pontederia, Pontederia - pickerelweed aquatic plant, hydrophyte, hydrophytic plant, water 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 |