[pik-er-uh
l-weed, pik-ruhl-] 
| any American plant of the genus Pontederia, esp. P. cordata, having spikes of blue flowers, common in shallow fresh water. |
| pickerel weed | |
noun | |
| American plant having spikes of blue flowers and growing in shallow water of streams and ponds [syn: pickerelweed] |