Myriophyllum


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Myriophyllum

 

a genus of herbaceous aquatic and marsh plants of the family Haloragidaceae. The leaves are for the most part whorled and usually toothed or pinnatisect; they grow on narrow lobules. The small, plain flowers grow in spikelike inflorescences that rise above the water. The genus consists of approximately 20 species (according to some data, as many as 50), which are distributed over the entire globe. The USSR has five species, the best-known of which are M. spicatum and the myriad leaf. Some species are grown in aquariums.

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Durante la mayor parte del ano Chiconahuapan tiene un nivel de inundacion superior al de Chignahuapan (Perez-Ortiz, 2005), que junto con su relativamente bajo nivel de eutroficacion, pueden explicar su mayor riqueza floristica y de formas de vida, asi como la presencia de hidrofitas sumergidas en pequenas areas (Ceratophyllum demersum, Myriophyllum heterophyllum, Ruppia maritima, Potamogeton spp.
Mezhuzhol were characterized by a high concentration of Myriophyllum spicatum, Typha latifolia, Polygonum amphibium, and Cyperaceae pollen, as well as diatoms Pediastrum boryanum.
THE EFFECTS OF WATER COLUMN [NO.sub.3] CONCENTRATION ON TISSUE TOTAL N AND [delta]15N OF EURASIAN WATERMILFOIL, MYRIOPHYLLUM SPICATUM **, Nicole M.
Assim, considerando a importância da avaliação do consumo de oxigênio na degradação da matéria orgânica (compostos de carbono e nitrogênio) nos sistemas aquáticos, este estudo visou estabelecer as concentrações adequadas da nitrapirina para a efetiva inibição das demandas de oxigênio produzidas pelas oxidações dos compostos nitrogenados, durante a mineralização aeróbia de lixiviado de uma macrófita aquática (Myriophyllum aquaticum).
A randomized block design transplant experiment conducted in five Adirondack lakes (Herkimer and Hamilton Counties, NY, USA) measured the relative growth rate (RGR) response of Myriophyllum tenellum, Lobelia dortmanna, Eriocaulon septangulare, Vallisneria americana, Elodea canadensis, and Potamogeton robbinsii to a dissolved inorganic carbon (D1C) gradient over the summer of 1999.
The inventory of aquatic macrophytes of Silver Lake documented 42 taxa, including three (7.1%) state-listed species (Ceratophyllum echinatum, Myriophyllum verticillatum, and Zannichellia palustris), one (2.4%) exotic (Myriophyllum spicatum), four (9.5%) charophytes (Chara braunii, Chara foliolosa, Chara globularis, and Nitella flexilis), and two (4.8%) liverworts (Riccia fluitans and Ricciocarpus natans).
Fossil types in this family are commonly Myriophyllum and Haloragis types.
Over a dozen invasive plant species were noted including common water hyacinth (Eichhornia crassipes), hydrilla (Hydrilla verticillata), cogon grass (Imperata cylindrica), purple loosestrife (Lythrum salicaria), Eurasian water-milfoil (Myriophyllum spicatum), and giant salvinia (Salvinia molesta).
Gramineae, Salix, Betula and aquatic pollen (Potamogeton and Myriophyllum) increase around 1500 yr BP.
and Phragmites sp.) and its bottom is sparsely vegetated (Chara sp., Myriophyllum, and Potamogeton sp.).
Abundant SAV species in tidal freshwater of the Chesapeake Bay watershed includes Vallisneria americana (wild celery), Hydrilla verticillata, and Myriophyllum (milfoil).