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An aquatic plant (Hydrilla verticillata) native to Eurasia, Africa, and Australia, having whorled, lance-shaped leaves and small white flowers. It is considered a weed in North America, where it forms large dense mats in waterways.

[New Latin, genus name, diminutive of Latin hydra, hydra; see hydra.]


(Plants) any aquatic plant of the Eurasian genus Hydrilla, growing underwater and forming large masses: used as an oxygenator in aquaria and pools. It was introduced in the S US where it has become a serious problem, choking fish and hindering navigation
[C20: New Latin, probably from hydra]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hydrilla - submersed plant with whorled lanceolate leaves and solitary axillary flowers; Old World plant naturalized in southern United States and clogging Florida's waterways
genus Hydrilla - one species
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
References in periodicals archive ?
ProcellaCOR is a new, advanced tool for selective, systemic control of major invasive aquatic weeds including hydrilla, Eurasian and hybrid watermilfoils, crested floating heart, water hyacinth, and many more.
I caught it around 1998 on a plastic worm, when the Stick Marsh side still had hydrilla," Willis said.
Lipless lures also work well ripped through patches of hydrilla.
In addition to the spotted lanternfly, which could impact hundreds of millions of dollars in Pennsylvania agricultural commodities and the quality of life in communities, the commonwealth is facing other threats from species such as hydrilla, an invasive plant affecting the states lakes; Round Goby, a fish invading rivers, and the Great Lakes; and Palmer Amaranth, an invasive weed affecting row crops.
Caption: Australian researcher Matt Purcell collecting hydrilla in China.
Aetokthonos hydrillicola has been identified in all reservoirs where AVM deaths have occurred and was identified growing abundantly on an exotic SAV hydrilla (Hydrilla verticillata) in Lake Tohopekaliga (Toho) in central Florida.
For example, the invasive plant hydrilla (Hydrilla verticillata), a recent invader in New York, will grow along the bottom of a river or lake in late spring and then grow up through the water column to the water's surface in the summer.
Environmental predictors of the occurrence of exotic Hydrilla verticillata (L.
He simply looks for hydrilla, an aquatic plant that provides a smorgasbord of food for the lake's diving and puddle ducks.
Prominent aquatic vegetation of the study area includes lyngbye's sedge (Carex fedia) hydrilla (Hydrilla verticillata) water lily (Nymphaea lotus) horned pond- weed (Zannichellia palustris) reed (Phragmites karka) Indian lotus (Nelumbo nucifera) curly-leaf pondweed (Potamogeton crispus) lesser Indian reed mace (Typha angustata) eel grass (Vallisneria spiralis) and muskgrass (Chara sp.
This study examined the attributes of Oligochaeta and Chironomidae assemblage structure in association with monospecific stands of two macrophyte species: Egeria najas and Hydrilla verticillata.
For instance, states spend millions of dollars each year trying to control invasive plants like kudzu and hydrilla.