View source for Pistia ← Pistia You do not have permission to edit this page, for the following reason: The action you have requested is limited to users in the group: Users. You can view and copy the source of this page. {{Treatment/ID |accepted_name=Pistia |accepted_authority=Linnaeus |publications={{Treatment/Publication |title=Sp. Pl. |place=2: 963. 1753; Gen. Pl. ed. 5; 411, 1754 |year=1754 }} |common_names=Water-lettuce |basionyms= |synonyms= |hierarchy=Araceae;Pistia |hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Araceae]]</div><div class="higher-taxon"><small>genus</small>[[Pistia]]</div></div> |etymology=Greek pistra, watertrough, in reference to the aquatic habitat |volume=Volume 22 |mention_page= |treatment_page= }}<!-- --><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form or habitat;whole_organism growth form or location;whole_organism behavior;whole_organism habitat;whole_organism growth form"><b>Herbs,</b> aquatic, floating on still or slow-moving water.</span> <span class="statement" id="st-d0_s1" data-properties="plant life cycle"><b>Stolons </b>frequently produced, terminating in young plants.</span> <span class="statement" id="st-d0_s2" data-properties="leaf quantity;leaf growth form or location;leaf orientation;leaf orientation;leaf architecture;rosette density"><b>Leaves </b>appearing before flowers, several, floating to ascending or nearly erect, in dense rosette, sessile to subsessile;</span> <span class="statement" id="st-d0_s3" data-properties="blade coloration;blade architecture;blade architecture;blade shape;base shape;base shape;apex shape;apex shape;apex shape;apex shape;apex shape;apex pubescence">blade light green to grayish green, simple, not peltate, obovate to spatulate, base obtuse or rounded, apex subtruncate, rounded, or notched, pubescent;</span> <span class="statement" id="st-d0_s4" data-properties="primary-vein arrangement">primary-veins nearly parallel.</span> <span class="statement" id="st-d0_s5" data-properties="peduncle orientation;peduncle height or length or size;peduncle pubescence"><b>Inflorescences:</b> peduncle erect, very short, pubescent;</span> <span class="statement" id="st-d0_s6" data-properties="spathe coloration;spathe condition;spathe architecture;flower reproduction;spadix reproduction">spathe greenish, closed basally, open apically, exposing tip of female flower and male spadix;</span> <span class="statement" id="st-d0_s7" data-properties="spadix fusion">spadix basally adnate to spathe.</span> <span class="statement" id="st-d0_s8" data-properties=""><b>Flowers </b>unisexual;</span> <span class="statement" id="st-d0_s9" data-properties="flower reproduction;flower architecture;whole_organism architecture;whole_organism growth form">staminate and pistillate on same plant;</span> <span class="statement" id="st-d0_s10" data-properties="flower architecture;flower position or shape;flower quantity;flower architecture">staminate flowers distal to single pistillate flower;</span> <span class="statement" id="st-d0_s11" data-properties="perianth presence">perianth absent.</span> <span class="statement" id="st-d0_s12" data-properties="fruit coloration;fruit coloration"><b>Fruits </b>not embedded in spadix, green, turning brown at maturity.</span> <span class="statement" id="st-d0_s13" data-properties="seed atypical quantity;seed atypical quantity;seed quantity"><b>Seeds </b>(1–) 4–10 (–20), mucilage probably present.</span> <span class="statement" id="st-d0_s14" data-properties="mucilage presence;x chromosome quantity">x = 14.</span><!-- -->{{Treatment/Body |distribution=Tropical and subtropical regions worldwide |discussion=<p>Although many names have been published in Pistia, it is currently considered to contain a single, highly variable species. Morphological variation is strongly influenced by environmental conditions and population density. Some botanists consider the genus to have been introduced into the United States and many regional floras state that fruits and seeds are not produced in the flora area. However, s Seeds with high rates of germination have been reported from many sites in Florida, however (F. A. Dray Jr. and T. D. Center 1989). The status of Pistia as native to the United States has not been resolved; available evidence suggests that it is indigenous.</p><!-- --><p>Pistia is economically and biologically important as a breeding site for insects, especially species of mosquitoes in the genus Mansonia, and it is often an aquatic weed. Although a serious pest in some areas of the world, Pistia has not caused major problems in the United States (M. C. Bruner 1982). At least 23 species of insects worldwide have been reported to feed on P. stratiotes; those shown to be effective in biological control include Neohydronomus affinis (Coleoptera: Curculionidae: Erirhininae) and Samea multiplicalis (Lepidoptera: Pyralidae: Pyraustinae) (M. C. Bruner 1982; K. L. Harley et al. 1990). Plants are cultivated as aquatic ornamentals in greenhouses and gardens.</p><!-- --><p>Species 1.</p> |tables= |references={{Treatment/Reference |id=mitra1966a |text=Mitra, E. 1966. Contributions to our knowledge of Indian freshwater plants 5. On the morphology, reproduction and autecology of Pistia stratiotes Linn. J. Asiat. Soc. 8: 115--135. }}{{Treatment/Reference |id=stoddard1989a |text=Stoddard, A. A. 1989. The phytogeography and paleoflo[r]istics of Pistia stratiotes L. Aquatics 11(3): 21--24. }} }}<!-- --><!-- -->{{#Taxon: name=Pistia |authority=Linnaeus |rank=genus |parent rank=family |synonyms= |basionyms= |family=Araceae |distribution=Tropical and subtropical regions worldwide |reference=mitra1966a;stoddard1989a |publication title=Sp. Pl. |publication year=1754 |special status= |source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/62857cf6bca5c4637d27b113da92d27dbf9962f4/V22/V22_385.xml |genus=Pistia |apex pubescence=pubescent |apex shape=notched;rounded;notched;rounded;subtruncate |base shape=rounded;obtuse |blade architecture=not peltate;simple |blade coloration=light green;grayish green |blade shape=obovate;spatulate |flower architecture=pistillate;staminate;staminate |flower position or shape=distal |flower quantity=single |flower reproduction=unisexual;female |fruit coloration=brown;green |leaf architecture=sessile;subsessile |leaf growth form or location=floating |leaf orientation=erect;ascending |leaf quantity=several |mucilage presence=absent |peduncle height or length or size=short |peduncle orientation=erect |peduncle pubescence=pubescent |perianth presence=absent |plant life cycle=young |primary-vein arrangement=parallel |rosette density=dense |seed atypical quantity=10;20 |seed quantity=4;10 |spadix fusion=adnate |spadix reproduction=male |spathe architecture=open |spathe coloration=greenish |spathe condition=closed |whole_organism architecture=pistillate |whole_organism behavior=slow-moving |whole_organism growth form=plant;herb |whole_organism growth form or habitat=aquatic |whole_organism growth form or location=floating |whole_organism habitat=water |x chromosome quantity=14 }}<!-- -->[[Category:Treatment]][[Category:Araceae]] Templates used on this page: Template:Araceae (view source) Template:Treatment/AuthorLink (view source) Template:Treatment/Body (view source) Template:Treatment/Body/Maps (view source) Template:Treatment/ID (view source) Template:Treatment/Publication (view source) Template:Treatment/Reference (view source) Return to Pistia.