pondweed


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pondweed,

common name for the family Potamogetonaceae, and for weedy aquatic herbs of the genus Potamogeton, of which about 50 known species inhabit North American ponds and slow streams. They have slender stems and small spikes of inconspicuous flowers appearing above the water. A few species are cultivated—some as waterfowl food and for fish protection in conservation projects. The saltwater eelgrass (genus Zostera) of gently sloping shores is closely related. Pondweeds are classified in the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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, class Liliopsida, order Najadales.
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pondweed

1. any of various water plants of the genus Potamogeton, which grow in ponds and slow streams: family Potamogetonaceae
2. Brit any of various unrelated water plants, such as Canadian pondweed, mare's-tail, and water milfoil, that have thin or much divided leaves
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Their study on pondweeds -- an important bioindicator of aquatic ecosystem health -- allows researchers to overcome difficulties in monitoring and identification, and draw conclusions regarding plant diversity and water quality.
Phase Two included (1) estimating curly-leaf pondweed beds for comparison to previous mapping or survey, (2) collecting internal load calculations under various conditions for cores, and (3) installing fourteen mini piezometers.
Hodges, "Cryptic species in an endangered pondweed community (Potamogeton, potamogetonaceae) revealed by AFLP markers," American Journal of Botany, vol.
In most cases, piscine leeches were collected directly from the fish caught with different fishing tackles such as fishing net and hydrobiological net or were found on aquatic vegetation (like water milfoil, pondweed, and waterweed).
Floaters, like pondweed, water lilies, and duckweed provide quick surface cover to prevent excess algae accumulation.
They were recorded crossing long leaf pondweed (Potamotegon nodosus Poir.), and foraging up to 15 m from the shore in a Texas pond (Patrock 2007).
Mosquito control in wastewater: a controlled and quantitative comparison of Pupfish (Cyprinodon nevadensis amargosae), mosquito fish (Gambusia affinis) and guppies (Poecilia reticulata) in Sago pondweed marshes.
So glad I bumped into you." Gibblewurp started and almost lost his false teeth in the glass of pondweed punch he was holding.
Mae un pwll cymharol fawr wrth ochr y llwybr pren, ac yn hwn mae un dyfrllys eithaf prin yn tyfu, sef dyfrllys y gors galchog (Potamogeton colouratus; fen pondweed).