from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A freshwater plant (Pontederia cordata) of eastern North America, having heart-shaped leaves with long petioles and spikes of violet-blue flowers.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of several freshwater plants, of the genus Pontederia, that have heart-shaped leaves
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. American plant having spikes of blue flowers and growing in shallow water of streams and ponds
Another major problem in the region is water hyacinth, also known as pickerelweed, which is choking Lake Victoria, Africa's largest.
The tidal marshes are dominated by narrowleaf cattail, wild rice, spatterdock and pickerelweed.
And in the water was pickerelweed not yet in bloom and bright yellow bullhead lilies.
They usually fill with marsh plants such as arrowhead, water arum, and pickerelweed.
Cattail, wild rice, pickerelweed, and arrowhead are common and help support a large and diverse range of bird and fish species, among other wildlife.
Two beneficial plants Cassani said can be installed around lake margins are bulrush - sometimes called buggywhips - and lower growing pickerelweed, which produces beautiful blue flower spikes.
The NRS units planted with calla lily had lower nutrient removal than canna and pickerelweed.
Dwarf papyrus had similar total biomass as pickerelweed, but less shoot biomass.
NRS units planted with dwarf papyrus had similar nutrient recovery rate as pickerelweed, but much less total N and P were removed as a result of less water consumption.
The results showed that 'Australia' canna had the greatest water consumption, total biomass production, and aboveground nitrogen and phosphorous content, followed by pickerelweed.
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