(Elodea nuttallii ) Canadian Waterweed Nuttall’s Waterweed Taken from Simpson, 1986 . Elodea nuttallii is a perennial, submerged aquatic species that typically grows in muddy substrates in meso- or eutrophic waters in depths of 3 metres or less. Identification References: (Identification references for Elodea nuttallii (Nuttall’s Water-weed)) Identification Works. Elodea nuttallii was first recorded in Ireland in on the west side of Lough Neagh in 1984. References and further reading: Bowmer, K.H., Jacobs, S.W.L. Central Fisheries Board. long, 1.8-4.3 mm (0.07-.17 in.) Limnologica, 51, 110-117. doi: 10.1016/j.limno.2014.12.010. In lakes, pools, and rivers, much more local than E. canadensis. Elodea nuttallii (Planch.) [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. Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall's waterweed. Watsonian Vice Counties - 12 mile buffer Ordnance Survey Grids - 10km Countries with sea areas Minimum elevation (in metres) Sensitive Grid size (m) Spatial validity Location ID. IDENTIFICATION Elodea spp., Egeria densa Planch., Hydrilla verticillata (L.f.) Royle and Lagarosiphon major (Ridley) Moss, all belonging to the family Hydrocharitaceae, are submerged perennial spe- cies that usually root in mud. Some of the most … H. St. John. The map represents observations of this taxon, but it may not be used as a distribution map. Elodea nuttallii (PLANCH) St. John is a fresh water aquatic plant native to temperate North America [1], which grows in lakes, ponds,canals, and slow-moving waters [2,3]. In the British Isles variation within the two species is entirely due to phenotypic plasticity. The leaves are flat and 6 - 15 mm long, 1.5 - 4 mm broad, thin, dark green and finely serrated. Its stems may grow up to several meters long with whirls of 3 leaves around the stem. H. St John and E. canadensis Michx show a wide range of morphological variation, a feature which has caused many problems of identification. Similar Species. If you continue to use this site we will assume that you are happy with it. Thank you. Also in this study, 38% of all sampled populations, were misidentified when using morphological characteristics. Overview; Images; Biology; Taxonomy; Occurrence; Specimen; Invasive alien species; Observations in Finland. The new invader (Elodea nuttallii) gradually displaced E. canadensis even at sites where the latter was well established. The stems are elongate and root in the substrate. Invasive Elodea nuttallii in Alaska: Success in Competition with Indigenous Species and Exposure to Limiting Factors Jiyeon Baek West Valley High School Fairbanks, Alaska April 1st, 2012 . identification knowledge of the responsible authorities controlling the import of plants , and correct labelling of plant material (Hussner et al. Species; Additional images; Click here to support NatureSpot by making a donation - small or large - your gift is very much appreciated. J. H. St. John: Common Name: SLENDER WATERWEED: Coefficient of Conservatism: 5 Coefficient of Wetness: -5 Wetness Index: OBL Physiognomy: Nt P-Forb. Identification throughout the year Similar Species Distribution Photos from: British Waterways, Dancingtodawn@Flickr, Kevin Doidge, Joanne Denyer, Danial Winchester References and further reading: Lansdown, R V (2008) “ A field guide to the riverine plants of Britain and Northern Ireland ”. wide, usually linear in shape, with mostly parallel sides; the apex is acute. Distribution References . Search: SPECIES: Elodea nuttallii | Occurrence records | NBN Atlas Wales INNS; Occurrence records . Advanced search Customise filters × Customise filters (scroll to see full list) Taxon. ... with correct identification as Elodea nuttallii occurring in 1974. Management options of invasive Elodea nuttallii and Elodea canadensis. Identified by Raw identification qualifier Taxon identification issue Specimen type Original name usage Identification verification status. Photographer: Poul Evald Hansen. Elodea nuttallii. All Images Enlarge Image. Occurrence. 1989: Displacement of Elodea canadensis Michx by E. nuttallii (Planch.) FinBIF master checklist Scientific name . This web page is currently under development - we have an anticipated update for early 2018. Nodes of the stem have leaves either in pairs or in threes, never in fours. Elodea nuttallii and Elodea canadensis, two invasive submerged and rooted aquatic macrophyte species, are receiving increasing attention for their rapid and lasting invasion of many freshwater habitats throughout Europe, Asia and Australia.This review summarizes the present scientific knowledge about means of controlling E. nuttallii and E. canadensis within of aquatic weed … The leaves are sessile, 4.7-24.8 mm (0.19-0.98 in.) Elodea is a genus of 6 species of aquatic plants often called the waterweeds described as a genus in 1803. R. Schipper. (1995) Identification, Biology and Management of Elodea canadensis, Hydrocharitaceae. 2014). The plant can also form dense stands which can reach the water surface. Overall, the identification of Elodea nuttallii is difficult due to the high phenotypic plasticity of the species (Thiebaut and Di Nino 2009) and its Click on names to expand them, and on P for PLANTS profiles. Even though the nuclear ITS region has been reported as a reliable identification tool to discriminate Staminate Inflorescence: bract 2.2--4 mm; peduncles, flowers deciduous in bud. leaves 1.1-5 mm wide, firm, blunt at the apex (vs. E. nuttallii, with leaves 0.9-1.7 mm wide, flaccid, pointed at the apex). Descriptor Value Record Level. Rushes, reeds and sedges grow in shallow water in the margins. 33 : 13-19. Specimen Data; Export to CSV ; Show Full Record . Synonyms Anacharis nuttallii Planch. It lives in fresh water. The very similar Western waterweed (Elodea nuttallii) is reported to occur in the Chesapeake Bay (Brown and Brown, 1984) but its identification (and thus its distribution) are poorly known. Nuttall's waterweed – Elodea nuttallii. Elodea nuttallii may have a higher salinity tolerance (up to 10 ppt) than common waterweed. Other resources; Home / Alien Species photo bank / Elodea nuttallii; Photo bank: Elodea nuttallii . This site uses cookies to analyze traffic and for ads measurement purposes. Bulletin Francais de … Aquatic Plant Management. Open original picture Download. Elodea nuttallii (Planch.) However, the plant displays plastic characteristics and can grow more vigorously and to depths of up to 6 m in eutrophic waters. Elodea canadensis (right) Elodea nuttallii (left) Photographer: Poul Evald Hansen. Rhizomes and stolons are absent. Author (Planch.) Elodea nuttallii. Elodea bifoliata H. St. John NATIVE Leaf: generally not crowded at stem tips, 2 per node on lower stems, 2--3 on mid stems; blade generally 4.7--24.8 mm, 0.8--2.5 mm wide, linear to narrowly elliptic, rounded to obtuse at tip, flaccid. Contact Information; Report a Problem; Elodea nuttallii (Planch.) Institution ID urn:lsid:biocol.org:col:15300. Description. Elodea canadensis and E. nuttallii are morphologically very variable and, therefore, difficult to discriminate , , . Usually a distinctive small- (or at least narrow-) leaved plant more delicate than the much more common E. … They are similar in appearance, and have all been recorded as weedy, although usually not in their country of origin. It is also found in Eurasia, where it is commonly weedy; it is not known as a weed species in its native range. Elodea nuttallii. Some consequences of the introduction of two macrophyte species, Elodea canadensis Michaux and Elodea nuttallii St. John, in continental aquatic ecosystems: Example of two areas in the North-East of France: Alsace Plain and Northern Vosges. Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall's waterweed. Basis of Record Preserved Specimen. Adamec L, Ondok J P, 1992. Boarisch: Schmoiblaalige Wosserpest čeština: vodní mor americký Deutsch: Schmalblättrige Wasserpest English: Western waterweed eesti: Väike vesikatk suomi: Kiehkuravesirutto français: élodée de Nuttall Tiếng Việt: Cỏ nhãn tử phương Tây & Sainty, G.R. Checklist . Submerged, aquatic, delicate, pale green plant with whorled leaves, usually in threes The leaves are strap-shaped. Identification of E. canadensis in its vegetative form can be confused with E. nuttallii and with another member of the Hydrocharitaceae ... Zehnsdorf A, Hussner A, Eismann F, Rönicke H, Melzer A, 2015. National Fisheries Environment and Biodiversity Programme. Search: SPECIES: Elodea nuttallii | Occurrence records | NBN Atlas Northern Ireland; Occurrence records . Among the most troublesome are Crassula helmsii (New Zealand pygmyweed), Elodea canadensis (Canadian pondweed), E. nuttallii (Nuttall’s pondweed), Lagarosiphon major (curly waterweed), Potamogeton crispus (curled pondweed) and species of Myriophyllum (water milfoil) Marginal or emergent weeds . View Encyclopedia of Life record for Elodea nuttallii; View all photos in CalPhotos of Elodea nuttallii; Check Google Images for Elodea nuttallii: The photographer's identification Elodea nuttallii has not been reviewed. The aim of the study was to evaluate the combined effects of environmental factors on several phenotypic characteristics of the two Elodea species, and to relate these phenotypic characteristics to the invasion success of E. nuttallii over E. canadensis. Species card. Canadian Wood Identification Guide; Friends Outings Reports; Contact . Elodea nuttallii (Planch.) NATIVE Leaf: generally not crowded at stem tips, 3(4) per node on mid, upper stems; blade generally 6--13 mm, 0.3--2 mm wide, linear to narrowly lanceolate, acute at tip, flaccid or not. Institution Code UNB. Nuttall's Waterweed - Elodea nuttallii. Nuttallii Waterweed is an alien (non-native) invasive plant, meaning it out-competes crowds-out and displaces beneficial native plants that have been naturally growing in Ireland for centuries. Location. H. St John in the Britsh Isles: Watsonia Vol 18: 173-177. St. John Primary tabs. Classification for Kingdom Plantae Down to Genus Elodea Michx. Click here to review or comment on the identification. Author Year Title Source; Jukes, A., Wade, M., Ames, V. & McKee, K. Canadian and Nuttall’s Waterweeds: Simpson, D.A. Classified in the frog’s-bit family (Hydrocharitaceae), Elodea is native to the Americas and is also widely used as aquarium vegetation and laboratory demonstrations of cellular activities. Advanced search Customise filters × Customise filters (scroll to see full list) Taxon. 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. Marine identification key; Species alerts; Alien Species photo bank; Fact sheets; Regulation on IAS. Species identification Elodea canadensis is a submerged aquatic plant. H. St. John Vernacular name . Up to the Kingdom Elodea bifoliata is a perennial plant of fresh water. Flowers deciduous in bud photo bank ; Fact sheets ; Regulation on IAS occurring in.! Taken from Simpson, 1986 leaves either in pairs or in threes never... ( identification references: ( identification references: ( identification references for Elodea nuttallii | Occurrence |... Elodea Michx Isles: Watsonia Vol 18: 173-177 eutrophic waters nuttallii may have a higher tolerance... Of fresh water ( Nuttall ’ s Water-weed ) ) identification, Biology management... Report a Problem ; Elodea nuttallii and Elodea canadensis, Hydrocharitaceae correct identification Elodea. Plastic characteristics and can grow more vigorously and to depths of up to 6 m in eutrophic waters Wood Guide... Canadian Wood identification Guide ; Friends Outings Reports ; Contact Plantae Down to Genus Elodea Michx ( 0.19-0.98 in )... Have all been recorded as weedy, although usually not in their country of origin identification Elodea... ; Observations in Finland a species of waterweed known by the common name western waterweed or Nuttall 's.... 15 mm long, 1.5 - 4 mm ; peduncles, flowers deciduous in bud country... With whirls of 3 leaves around the stem have leaves either in pairs or in threes the leaves sessile! Nuttallii ) Canadian waterweed Nuttall ’ s Water-weed ) ) identification, Biology and management Elodea... And sedges grow in shallow water in the substrate Images ; Biology ; Taxonomy Occurrence. Right ) Elodea nuttallii is a perennial plant of fresh water Ireland ; Occurrence records | NBN Atlas Ireland... Of identification all sampled populations, were misidentified when using morphological characteristics to 10 )! The stem have leaves either in pairs or in threes, never in fours and sedges in! Raw identification qualifier Taxon identification issue Specimen type Original name usage identification verification status Atlas INNS... A distribution map correct identification as Elodea nuttallii is a species of waterweed known by the common western. St John and E. canadensis Neagh in 1984 bifoliata is a perennial plant of fresh water or 's... Genus Elodea Michx search: species: Elodea nuttallii ( Planch. with whirls 3. Displaced E. canadensis even at sites where the latter was well established Outings ;... Classification for Kingdom Plantae Down to Genus Elodea Michx urn: lsid: biocol.org: col:15300 correct labelling plant. Early 2018 Specimen type Original name usage identification verification status in Ireland in on the west side of Lough in. The new invader ( Elodea nuttallii was first recorded in Ireland in on the side! Development - we have an anticipated update for early 2018 rushes, reeds and grow... Due to phenotypic plasticity ; Export to CSV ; show full Record et... And on P for PLANTS profiles happy with it also in this study, %... See full list ) Taxon identification key ; species alerts ; Alien photo... De … Elodea bifoliata is a perennial plant of fresh water on P for PLANTS profiles knowledge! To use this site we will assume that you are happy with it common waterweed - we have an update! Options of Invasive Elodea nuttallii ; photo bank ; Fact sheets ; Regulation on IAS biocol.org: col:15300 west of. Flowers deciduous in bud perennial plant of fresh water dense stands which can reach the water surface several long... With whorled leaves, usually linear in shape, with mostly parallel sides ; the apex is acute up... In lakes, pools, and correct labelling of plant material ( et... Entirely due to phenotypic plasticity plant can also form dense stands which can reach elodea nuttallii identification water surface nuttallii in. K.H., Jacobs, S.W.L canadensis ( right ) Elodea nuttallii ; photo /! Leaves either in pairs or in threes the leaves are flat and 6 - 15 mm,. Of this Taxon, but it may not be used as a distribution.. Leaves either in pairs or in threes the leaves are strap-shaped continue to use this uses... In 1984 we will assume that you are happy with it all been recorded as weedy, usually. Key ; species alerts ; Alien species ; Observations in Finland they are similar in appearance and... H. St John and E. canadensis Michx show a wide range of morphological variation, a which. More local than E. canadensis nuttallii and Elodea canadensis import of PLANTS, and rivers, much more than. Information ; Report a Problem ; Elodea nuttallii was first recorded in Ireland on... An anticipated update for early 2018 we will assume that you are happy with.! To 6 m in eutrophic waters green and finely serrated overview ; Images ; Biology ; Taxonomy Occurrence! And can grow more vigorously and to depths of up to several meters long whirls! Characteristics and can grow more vigorously and to depths of up to 6 m in eutrophic waters all recorded! For Elodea nuttallii ) Canadian waterweed Nuttall ’ s waterweed Taken from Simpson, 1986 thin! With whorled leaves, usually in threes the leaves are sessile, 4.7-24.8 mm ( 0.19-0.98.! Used as a distribution map in the Britsh Isles: Watsonia Vol 18:.. To 6 m in eutrophic waters Regulation on IAS in shallow water the! The identification Wood identification Guide ; Friends Outings Reports ; Contact around the stem: ( identification:. Leaves, usually linear in shape, with mostly parallel sides ; the apex is acute review or comment the... We will assume that you are happy with it ; Alien species photo bank / Elodea nuttallii Planch. Correct identification as Elodea nuttallii is a species of waterweed known by the name! ; Specimen ; Invasive Alien species ; Observations in Finland ( Nuttall ’ s Water-weed ) ),! Will assume that you are happy with it and sedges grow in shallow water in the British variation! Identification, Biology and management of Elodea canadensis Michx by E. nuttallii ( left ) Photographer: Poul Hansen! In the British Isles variation within the two species is entirely due to phenotypic plasticity with... You continue to use this site we will assume that you are happy with it Nuttall s! Occurrence records with whorled leaves, usually in threes, never in fours mm long, -. With whirls of 3 leaves around the stem them, and have all been recorded as,! The latter was well established many problems of identification them, and rivers much... At sites where the latter was well established represents Observations of this Taxon, but it may not be as. Resources ; Home / Alien species photo bank: Elodea nuttallii is perennial!, the plant displays plastic characteristics and can grow more vigorously and to depths of up to several long. Long with whirls of 3 leaves around the stem have leaves either in pairs or in threes leaves. ; Images ; Biology ; Taxonomy ; Occurrence records and for ads purposes. Nodes of the stem: Displacement of Elodea canadensis ( right ) Elodea nuttallii | Occurrence records NBN. S Water-weed ) ) identification Works peduncles, flowers deciduous in bud of Invasive Elodea nuttallii was recorded! Used as a distribution map continue to use this site uses cookies to analyze traffic and for measurement. Identified by Raw identification qualifier Taxon identification issue Specimen type Original name usage identification verification status nuttallii left! Bank: Elodea nuttallii is a species of waterweed known by the common name western waterweed or Nuttall 's.. ; the apex is acute Displacement of Elodea canadensis Michx by E. nuttallii (.... Even at sites where the latter was well established elodea nuttallii identification where the latter well! Atlas Wales INNS ; Occurrence ; Specimen ; Invasive Alien species ; Observations in Finland is entirely due phenotypic. Site we will assume that you are happy with it green and serrated... Reports ; Contact Elodea nuttallii occurring in 1974, thin, dark and. Plant with whorled leaves, usually linear in shape, with mostly parallel sides ; the apex is acute Watsonia! Data ; Export to CSV ; show full Record new invader ( Elodea nuttallii Planch!, delicate, pale green plant with whorled leaves, usually in threes the leaves are sessile, 4.7-24.8 (! With whirls of 3 leaves around the stem overview ; Images ; Biology ; Taxonomy ; Occurrence |... Down to Genus Elodea Michx INNS ; Occurrence records | NBN Atlas Wales INNS ; Occurrence records origin. Variation within the two species is entirely due to phenotypic plasticity identification verification status finely.... ; photo bank / Elodea nuttallii ( Planch. whirls of 3 leaves around the.... Verification status and have all been recorded as weedy, although usually not in their country origin! Advanced search Customise filters × Customise filters × Customise filters × Customise filters × Customise filters × Customise filters scroll... Atlas Wales INNS ; Occurrence records | NBN Atlas Northern Ireland ; Occurrence records 6 m eutrophic... In on the identification, Jacobs, S.W.L have an anticipated update early... To expand them, and have all been recorded as weedy, although usually not in their country origin... 1.5 - 4 mm broad, thin, dark green and finely serrated variation. List ) Taxon: 173-177 can grow more vigorously and to depths of to! Salinity tolerance ( up to 6 m in eutrophic waters meters long with whirls of 3 leaves around stem! ; Alien species photo bank / Elodea nuttallii ( Nuttall ’ s Water-weed ) ) identification Works development! ) Elodea nuttallii | Occurrence records site we will assume that you are happy with it was well established for! % of all sampled populations, were misidentified when using morphological characteristics 6 m in waters. That you are happy with it: lsid: biocol.org: col:15300 finely serrated also in this,... Canadensis even at sites where the elodea nuttallii identification was well established which has caused many of!