Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall's waterweed.[1] This is a perennial aquatic plant which is native to North America where it grows submersed in lakes, rivers, and other shallow water bodies. It is also found in Eurasia, where it is commonly weedy; it is not known as a weed species in its native range. It is sometimes used as an aquarium plant.
Anacharis nuttallii Anacharis occidentalis Elodea columbiana Elodea minor Elodea occidentalis Philotria minor Philotria nuttallii Philotria occidentalis
It is similar to its relative E. canadensis except that the leaves taper to an acute point. It has a thin branching stem with whorls of 3-4 (exceptionally, 5) flat leaves at intervals. Some leaves are recurved and twisted, with minute teeth. It bears tiny flowers, the staminate ones abscissing from their stalks and floating away from the plant. It flowers from May until October.[2] In Europe nearly all individuals are female, only some places with male plants are known.[3][4]
DistributionEdit
This species is native to temperate North America. It has been naturalised in Europe since 1939 and in Japan since the 1960s.[5] The first European record of Elodea nuttallii was probably 1914 in England, though it had been identified wrongly as Hydrilla verticillata,[6] with correct identification as Elodea nuttallii occurring in 1974. It seems to have been originally naturalised in Oxfordshire in 1966, but has now spread to most of England, and many parts of lowland Wales and lowland Scotland. The first record in Ireland was in Lough Neagh in 1984, and it has now spread widely in the country.[5] It is an invasive species in Europe; it reached Belgium in 1939, the Netherlands in 1941, Germany in 1953, Denmark in 1974, Sweden in 1991 and Norway in 2006. It is now present in most of Northern Europe, in many parts displacing the invasive Elodea canadensis.[7]
^Bennet 1914, cited in Weber-Oldecop, D.W. (1977): Elodea nuttallii (Planch.) St. John, eine neue limnische Phanerogame der deutschen Flora. Archiv für Hydrobiologie 79: 397-4037
^"Invasive Alien Species Fact Sheet : Elodea canadensis, Elodea nuttallii and Elodea callitrichoides" (PDF). NOBANIS. Retrieved 2020-03-13.
External linksEdit
Media related to Elodea nuttallii at Wikimedia Commons
Jepson Manual Treatment
August 29, 2023
elodea, nuttallii, species, waterweed, known, common, name, western, waterweed, nuttall, waterweed, this, perennial, aquatic, plant, which, native, north, america, where, grows, submersed, lakes, rivers, other, shallow, water, bodies, also, found, eurasia, whe. Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall s waterweed 1 This is a perennial aquatic plant which is native to North America where it grows submersed in lakes rivers and other shallow water bodies It is also found in Eurasia where it is commonly weedy it is not known as a weed species in its native range It is sometimes used as an aquarium plant Elodea nuttalliiScientific classificationKingdom PlantaeClade TracheophytesClade AngiospermsClade MonocotsOrder AlismatalesFamily HydrocharitaceaeGenus ElodeaSpecies E nuttalliiBinomial nameElodea nuttallii Planch H St JohnSynonymsAnacharis nuttalliiAnacharis occidentalisElodea columbianaElodea minorElodea occidentalisPhilotria minorPhilotria nuttalliiPhilotria occidentalisFemale flower of Elodea nuttallii Contents 1 Description 2 Distribution 3 References 4 External linksDescription Edit The leaves taper to a fine pointIt is similar to its relative E canadensis except that the leaves taper to an acute point It has a thin branching stem with whorls of 3 4 exceptionally 5 flat leaves at intervals Some leaves are recurved and twisted with minute teeth It bears tiny flowers the staminate ones abscissing from their stalks and floating away from the plant It flowers from May until October 2 In Europe nearly all individuals are female only some places with male plants are known 3 4 Distribution EditThis species is native to temperate North America It has been naturalised in Europe since 1939 and in Japan since the 1960s 5 The first European record of Elodea nuttallii was probably 1914 in England though it had been identified wrongly as Hydrilla verticillata 6 with correct identification as Elodea nuttallii occurring in 1974 It seems to have been originally naturalised in Oxfordshire in 1966 but has now spread to most of England and many parts of lowland Wales and lowland Scotland The first record in Ireland was in Lough Neagh in 1984 and it has now spread widely in the country 5 It is an invasive species in Europe it reached Belgium in 1939 the Netherlands in 1941 Germany in 1953 Denmark in 1974 Sweden in 1991 and Norway in 2006 It is now present in most of Northern Europe in many parts displacing the invasive Elodea canadensis 7 References Edit BSBI List 2007 xls Botanical Society of Britain and Ireland Archived from the original xls on 2015 06 26 Retrieved 2014 10 17 Rose Francis 2006 The Wild Flower Key Frederick Warne amp Co pp 483 484 ISBN 978 0 7232 5175 0 Unbenanntes Dokument www aquatischeneophyten de Archived from the original on 2015 08 14 Retrieved 2017 01 31 Stace C A 2019 New Flora of the British Isles Suffolk ISBN 978 1 5272 2630 2 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link a b Elodea nuttallii 1997 Retrieved 13 March 2020 a href Template Cite book html title Template Cite book cite book a work ignored help Bennet 1914 cited in Weber Oldecop D W 1977 Elodea nuttallii Planch St John eine neue limnische Phanerogame der deutschen Flora Archiv fur Hydrobiologie 79 397 4037 Invasive Alien Species Fact Sheet Elodea canadensis Elodea nuttallii and Elodea callitrichoides PDF NOBANIS Retrieved 2020 03 13 External links Edit Media related to Elodea nuttallii at Wikimedia Commons Jepson Manual Treatment Retrieved from https en wikipedia org w index php title Elodea nuttallii amp oldid 1160261744, wikipedia, wiki, book, books, library,
