Pistia

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Pistia

 

a genus of plants of the family Araceae. There is one species, the water lettuce (P. stratiotes), which is a free-floating or sometimes rooted aquatic plant with rosettes of wedge-shaped, downy, light green leaves that fold up at night. New leaf rosettes develop from the axillary buds. The flowers are unisexual and naked; they are in small spadices surrounded by a whitish spathe. In the lower part of the spathe there is one pistillate flower with several male flowers above it. (Each male flower consists of two fused stamens.) The water lettuce is found in the tropics and subtropics of both hemispheres, mainly in freshwaters. It is cultivated in fishponds and aquariums. In China the plants are used as swine feed.

References in periodicals archive ?
18 Aquifoliaceae Ilex cymosa 19 Araceae Aglaeonema minus 20 Aglaeonema simplex 21 Pistia stratiotes 22 Araliaceae Schefflera avensis (Miq.
Additional material (in alcohol): 49[male] [male] brachypters, 3 [male] [male], macropters, 23 [female] [female]brachypters, and 24[female] [female] macropters, ARGENTINA: Isla Talavera (S 34[degrees] 06' 33"; W 58[degrees] 47' 18"), Buenos Aires IV-2010, on Pistia stratiotes, Cabrera Walsh, 5[male] [male] and 10 [female] [female] brachypters, Rio Hondo (S 27[degrees] 30' 29"; W 64[degrees] 54' 09"), Santiago del Estero 28-VIII-2011 on Pistia stratiotes Cabrera Walsh, col.
Three aquatic plants, Hydrilla verticillata, Pistia stratiotes, and Salvinia molesta, treated with different amounts of mercury were severely affected.
They also are known to bore into the stems and roots of living aquatic plants including Pistia stratiotes L.
For the purpose of shading, tall herbaceous plants can be planted around the edge of the nursery or the Azolla can be intercropped with rice, Pistia stratiotes, Eichhornia crassipes, or Alternanthera philoxeroides (Lumpkin, 1987a).
Azolla filiculoides, Cabomba caroliniana, Eichhornia crassipes, Pistia stratiotes, and Saluinia molesta), humid terrestrial weeds (Ageratina adenophora, Chromolaena odorata, Clidemia hirta, Coccinia grandis, Cyperus rotundus, Ipomea carnea, Lantana camara, Mikania micrantha, Mimosa spp.