Vallisneria spiralis Linnaeus has been reported in some of the older literature as being represented in North America. These reports are all based on a misapplication of the name V. spiralis and are actually V. americana. In warmer waters of southeastern United States are some populations of Vallisneria with much larger leaves that have been given the name V. neotropicalis. After considerable study of populations in the field, the plants formerly known as V. neotropicalis were determined to be just larger individuals of V. americana (R. M. Lowden 1982).
Vallisneria americana (Amerikanische Wasserschraube, Riesen-Vallisnerie) ist eine Pflanzenart aus der Familie der Froschbissgewächse (Hydrocharitaceae).
Die Blätter messen 10 bis 110 × 0,3 bis 1,5 Zentimeter. Die Blattspreite ist in Längsrichtung in drei Zonen unterteilt und ihr Rand ist ganz oder gesägt. Der Schaft der männlichen Blüten ist 30 bis 50 Millimeter lang und untergetaucht. Die Blüten sind 1 bis 1,5 Millimeter breit. Staubblätter sind 2 vorhanden. Die Staubfäden sind am Grund verwachsen. Der Schaft weiblicher Blüten ist verlängert, so dass die Blüten die Wasseroberfläche erreichen. Die Blüten sind meist einzeln, seltener in doldenähnlichen Büscheln angeordnet.
Die Blütezeit reicht vom Sommer bis zum Herbst.
Die Chromosomenzahl beträgt 2n = 20.[1]
Vallisneria americana wächst in Süß- und Brackwasser in Flüssen, Seen und Buchten in Höhenlagen von 0 bis 500 Meter. Die Art kommt in Kanada, den USA, Mexiko, in der Karibik und Mittelamerika und in Kolumbien vor.[2]
Vallisneria americana wurde 1803 von Michaux erstbeschrieben. Ein Synonym ist Vallisneria neotropicalis Victorin.
Vallisneria americana (Amerikanische Wasserschraube, Riesen-Vallisnerie) ist eine Pflanzenart aus der Familie der Froschbissgewächse (Hydrocharitaceae).
Vallisneria americana, commonly called wild celery, water-celery, tape grass, or eelgrass,[1] is a plant in the family Hydrocharitaceae, the "tape-grasses". V. americana is a fresh water species that can tolerate salt, living in salinities varying from fresh water (0 parts per thousand) to 18 parts per thousand, although the limit to the salt tolerance is unclear, and is generally dependent on the duration and intensity of the plants’ exposure to the saline water.[2][3][4] V. americana is a deep rooted plant with leaves, approximately one inch wide, with the ability to rise two or more meters above the clustered base of the plant.[5][6] Contrary to the implications of one of its common names, wild celery bears little to no resemblance to the celery used as a vegetable. V. americana grows under water and is consumed by various animals, including the canvasback. The plants themselves are long, limp, flat, and have a green mid-ridge.
Despite its name, it is not restricted to the Americas. It occurs naturally in Iraq, China, Japan, Korea, India, Papua New Guinea, the Philippines, Australia, Canada, the United States, Mexico, Guatemala, Honduras, Cuba, the Dominican Republic, Haiti and Venezuela.[1] It is found primarily in eastern North America, occurring west from Nova Scotia to South Dakota and South to the Gulf of Mexico. It has also been reported in the western states of Washington, Nebraska, New Mexico and Arizona.[5]
V. americana is cultivated for the aquarium trade, where it is a sold as a background plant.[7]
Like many seagrass ecosystems, V. americana beds provide a rich abundance of prey as food for other species, and is a refuge for many species, including commercial, recreational, endangered and invasive organisms, and also acts as a nursery for fishery species.[3][8] Beds of V. americana, especially in Louisiana, have been known to be homes to many crustacean, gastropods, invertebrates and fish, and have been known to be grazed on by West Indian Manatees.[2][8][9] The beds of V. americana are great at stabilizing sediment and shorelines, facilitating detrital food webs, and improving water quality by filtering the surrounding water.[2][3][4][9]
The salinity tolerance of V. americana has been up to debate, and has been topic of many scientific research and experiments. It has been suggested that the difference between the collected data sets is due to the varying duration of the experiments and the different methodology used in each experiment.[3] The highest tolerance range is generally noted to be anywhere from ten parts per thousand to twenty parts per thousand.[2][3][4] Many experiments have shown that the general trend of growth is that as the salinity of the water goes up, the growth of the plant decreases, but the roots of the plants are known to show greater tolerance to salinity than the shoots do.[3]
V. americana generally maintains its population by clonal reproduction through the use of runners, but they are also capable of reproducing through the use of seeds.[5][10] Salinity seems to affect the germination process in the same way it does the growth of the plant.[10]
Vallisneria americana, commonly called wild celery, water-celery, tape grass, or eelgrass, is a plant in the family Hydrocharitaceae, the "tape-grasses". V. americana is a fresh water species that can tolerate salt, living in salinities varying from fresh water (0 parts per thousand) to 18 parts per thousand, although the limit to the salt tolerance is unclear, and is generally dependent on the duration and intensity of the plants’ exposure to the saline water. V. americana is a deep rooted plant with leaves, approximately one inch wide, with the ability to rise two or more meters above the clustered base of the plant. Contrary to the implications of one of its common names, wild celery bears little to no resemblance to the celery used as a vegetable. V. americana grows under water and is consumed by various animals, including the canvasback. The plants themselves are long, limp, flat, and have a green mid-ridge.
Despite its name, it is not restricted to the Americas. It occurs naturally in Iraq, China, Japan, Korea, India, Papua New Guinea, the Philippines, Australia, Canada, the United States, Mexico, Guatemala, Honduras, Cuba, the Dominican Republic, Haiti and Venezuela. It is found primarily in eastern North America, occurring west from Nova Scotia to South Dakota and South to the Gulf of Mexico. It has also been reported in the western states of Washington, Nebraska, New Mexico and Arizona.
V. americana is cultivated for the aquarium trade, where it is a sold as a background plant.
Natura celerio aŭ Amerika valisnerio laŭ la latina scienca nomo (Vallisneria americana) estas planto de la familio de Hidrokaritacoj. Male al sugestoj de la nomo, la natura celerio ne similas al la celerio uzata kiel manĝebla vegetalo. La natura celerio kreskas sub akvo kaj estas konsumata de diversaj animaloj, kiaj la Blankadorsa anaso.
Spite la specia nomo, ĝi ne estas limigita al Ameriko. Ĝi vivas naturale en Irako, Ĉinio, Japanio, Koreio, Barato, Papuo-Nov-Gvineo, Filipinoj, Aŭstralio, Kanado, Usono, Meksiko, Gvatemalo, Honduro, Kubo, la Dominga Respubliko, Haitio kaj Venezuelo.[1]
Natura celerio aŭ Amerika valisnerio laŭ la latina scienca nomo (Vallisneria americana) estas planto de la familio de Hidrokaritacoj. Male al sugestoj de la nomo, la natura celerio ne similas al la celerio uzata kiel manĝebla vegetalo. La natura celerio kreskas sub akvo kaj estas konsumata de diversaj animaloj, kiaj la Blankadorsa anaso.
Spite la specia nomo, ĝi ne estas limigita al Ameriko. Ĝi vivas naturale en Irako, Ĉinio, Japanio, Koreio, Barato, Papuo-Nov-Gvineo, Filipinoj, Aŭstralio, Kanado, Usono, Meksiko, Gvatemalo, Honduro, Kubo, la Dominga Respubliko, Haitio kaj Venezuelo.
Vallisneria americana
La vallisnérie d'Amérique[1] (Vallisneria americana) aussi connue sous les noms de vallisnérie américaine, vallisnérie géante ou d'herbe à la barbotte[2],[1], est une plante de la famille des Hydrocharitaceae. Cette plante pousse dans les milieux aquatiques et peut donner des feuilles de plus de 80 cm de long.
La vallisnérie d'Amérique forme au fond de l’eau ses fleurs mâles et femelles sur des individus différents (diécie). Elle libère ensuite ses fleurs mâles qui montent jusqu’à la surface où elles s’ouvrent. Les fleurs femelles, quant à elles, poussent jusqu’à la surface où elles s’ouvrent à leur tour, parmi les fleurs mâles qui flottent autour. Après la fécondation, qui s’opère dans l’air, la fleur femelle se referme et retourne au fond de l’eau pour mûrir son fruit.
Vallisneria americana
La vallisnérie d'Amérique (Vallisneria americana) aussi connue sous les noms de vallisnérie américaine, vallisnérie géante ou d'herbe à la barbotte,, est une plante de la famille des Hydrocharitaceae. Cette plante pousse dans les milieux aquatiques et peut donner des feuilles de plus de 80 cm de long.
Synonymes (d'après ITIS) Vallisneria spiralis var. asiatica (Michx.) Torr. Vallisneria spiralis var. americana (Michx.) Torr. Vallisneria spiralis auct. non L. Vallisneria asiatica Michx. Vallisneria neotropicalis Vict.Nurzaniec amerykański, n. olbrzymi (Vallisneria americana Michx.) – gatunek rośliny z rodziny żabiściekowatych (Hydrocharitaceae). Pochodzi z ciepłych wód Ameryki Północnej i środkowej, Australii i Azji południowej i wschodniej. Zawleczony w wiele innych miejsc[2]. W Polsce uprawiany jako roślina akwariowa. Bylina dwupienna, rozrastająca się za pomocą kłącza. Ma długie równowąskie liście osiągające do ponad 150 cm długości.
Wymaga wody o pH 6,0-8,0 i temperaturze 18-30°C. Ma przeciętne wymagania świetlne i odżywcze. Jako roślina akwariowa zalecana jest do sadzenia w tylnej części wysokich akwariów, bądź zbiorników, w których roślina porastać ma częściowo lustro wody. Gatunek łatwy w hodowli, szybko się rozrasta i rozmnaża poprzez rozłogi, ma ozdobny wygląd, daje schronienie małym rybkom. Dobrze znosi okresowe wahania temperatur.
Nurzaniec amerykański, n. olbrzymi (Vallisneria americana Michx.) – gatunek rośliny z rodziny żabiściekowatych (Hydrocharitaceae). Pochodzi z ciepłych wód Ameryki Północnej i środkowej, Australii i Azji południowej i wschodniej. Zawleczony w wiele innych miejsc. W Polsce uprawiany jako roślina akwariowa. Bylina dwupienna, rozrastająca się za pomocą kłącza. Ma długie równowąskie liście osiągające do ponad 150 cm długości.
Vallisneria americana, yaygın olarak yabani kereviz (vahşi kereviz),[1] su kerevizi,[1] çim bant (şerit),[1] eelgrass [1] veya flumine-Mississippi [1] (flumine Latince nehir anlamına gelmektedir.) adlarıyla bilinen Hydrocharitaceae ailesinden şerit-ot bitkisidir. Ortak ve bilinen isimlerinin aksine yabani kerevizin bilinen kereviz sebzesiyle çok az ve neredeyse hiç benzerlik taşımamaktadır. Vallisneria americana su altında büyür ve Canvasback gibi çeşitli hayvan türleri tarafından besin olarak tüketilir. Bitki uzun, gevşek ve yassı bir yapıda olup, yemyeşil bir orta sırt bölümü vardır.
Verilen taksonomik ada rağmen bitkinin florası yalnızca Amerika Birleşik Devletleri ile sınırlı değildir. Bitki doğal olarak Irak, Çin, Japonya, Kore, Hindistan, Papua Yeni Gine, Filipinler, Avustralya, Kanada, Amerika Birleşik Devletleri, Meksika, Guatemala, Honduras, Küba, Dominik Cumhuriyeti, Haiti ve Venezuela florasında da bulunur.[1]
Vallisneria americana, yaygın olarak yabani kereviz (vahşi kereviz), su kerevizi, çim bant (şerit), eelgrass veya flumine-Mississippi (flumine Latince nehir anlamına gelmektedir.) adlarıyla bilinen Hydrocharitaceae ailesinden şerit-ot bitkisidir. Ortak ve bilinen isimlerinin aksine yabani kerevizin bilinen kereviz sebzesiyle çok az ve neredeyse hiç benzerlik taşımamaktadır. Vallisneria americana su altında büyür ve Canvasback gibi çeşitli hayvan türleri tarafından besin olarak tüketilir. Bitki uzun, gevşek ve yassı bir yapıda olup, yemyeşil bir orta sırt bölümü vardır.
Verilen taksonomik ada rağmen bitkinin florası yalnızca Amerika Birleşik Devletleri ile sınırlı değildir. Bitki doğal olarak Irak, Çin, Japonya, Kore, Hindistan, Papua Yeni Gine, Filipinler, Avustralya, Kanada, Amerika Birleşik Devletleri, Meksika, Guatemala, Honduras, Küba, Dominik Cumhuriyeti, Haiti ve Venezuela florasında da bulunur.
Hẹ thẳng, danh pháp khoa học Vallisneria americana, là một loài thực vật có hoa trong họ Hydrocharitaceae. Loài này được Michx. miêu tả khoa học đầu tiên năm 1803.[1]
Hẹ thẳng, danh pháp khoa học Vallisneria americana, là một loài thực vật có hoa trong họ Hydrocharitaceae. Loài này được Michx. miêu tả khoa học đầu tiên năm 1803.
Vallisneria americana Michx., 1803
Валлиснерия американская (лат. Vallisneria americana) — водное растение из рода Валлиснерия.
Валлиснерия американская растёт под водой и потребляется в пищу различными животными, в том числе и таким видом как Американский красноголовый нырок (Aythya valisineria). Сами растения длинные, вялые. Животные могут поедать все части растения: листья и подземные клубни.
Несмотря на название, ареал не ограничен Америкой. Он встречается в Ираке, Китае, Японии, Корее, Индии, Папуа — Новой Гвинее, Филиппинах, Австралии, Канаде, США, Мексике, Гватемале, Гондурасе, Кубе, Доминиканской Республике, Гаити и Венесуэле.[2]
Валлиснерия американская (лат. Vallisneria americana) — водное растение из рода Валлиснерия.
Валлиснерия американская растёт под водой и потребляется в пищу различными животными, в том числе и таким видом как Американский красноголовый нырок (Aythya valisineria). Сами растения длинные, вялые. Животные могут поедать все части растения: листья и подземные клубни.
Несмотря на название, ареал не ограничен Америкой. Он встречается в Ираке, Китае, Японии, Корее, Индии, Папуа — Новой Гвинее, Филиппинах, Австралии, Канаде, США, Мексике, Гватемале, Гондурасе, Кубе, Доминиканской Республике, Гаити и Венесуэле.