P. strictifolius. in part by the National Science Foundation. Ecologically, flat-stem pondweed provides a home for fish and invertebrates, and is grazed by waterfowl and muskrats. All rights reserved. Figure 3: Plant frequency for each depth zone in Lake Vermilion. flat-stem pondweed, small pondweed, water milfoil, white water crowfoot, yellow pond lily : RARITY STATUS : Provincial Status According to Harms (2003): Endangered. The leaves are narrow and grow 4-8 inches long. flat-stem / flatstem pondweed [Potamogeton zosteriformis, syn. All images and text © Submergent vegetation grows to a depth of 19 feet with canada waterweed, coontail, eurasian milfoil, flat stem pondweed, and northern milfoil being the most common species. See the marl encrustation (calcium carbonate deposits) on leaves above. See Terms of Use and Privacy Policy. Its flat and angled leaves are the first visible and distinct feature. Emergent plants growing near curlyleaf pondweed stands are arrowhead (Sagittaria latifolia) and cattail (Typha latifolia) as well as small free-floating duckweeds (Lemna minor, L. triscula) and watermeal (Wolffia columbiana; Nichols and Yandell 1995). 7C. a sighting. Submerged Weed. Web design and content copyright © 2006-2020 MinnesotaWildflowers.info. State documented: documented Native. 1991; Smith and Barko 1990; Strand and Weisner 2001). County documented: documented No floating leaves are produced. Cylindrical spike, held above the surface of the water, ½ to 1+ inch (to 3 cm) long at the tips of branching stems. Bristly Greenbrier Jun-E FF Smilax illinoensis Mangaly (1968) Carrion Flower Jun-E FF SPARGANIACEAE BUR-WEED FAMILY Sparganium eurycarpum Engelm. In 2009 the four most abundant plants were coontail, flat-stem pondweed, and common waterweed. They have a smooth margin, and 3 main parallel veins. Potamogeton strictifolius has leaf blades with 3â5â(â7) veins and routinely produces fruits. The multiple long stems often form masses at the water surface. ), please check the links and invasive species pages for additional resources. SUBMERSED PLANTS. Your email address: (required) Fruit is a dry seed (achene), light green to olive at maturity. TYPICAL TREATMENT: Aquathol or Reward NATIVE: Floating-leaf pondweed has stems that emerge from red-spotted rhizomes. 28.⯠Curly Pondweed, Flat-Stem Pondweed Family: Potamogetonaceae Origin: Eurasia, Africa, Australia and North America General description. An aquatic vegetation community where Ogden’s Pondweed exists or has existed at any time in the past that is in an area of a stream, river or other body of water that is less than five metres deep. Ogden’s Pondweed is thought to have originated as a fertile hybrid between Hill’s Pondweed and Flat-stem Pondweed (Hellquist and Hilton 1983). SUBMERSED PLANTS continued… 7C. An illustrated flora of the northern United States, Canada and the British Possessions. Eutrophication is likely the greatest threat to this endangered species. Pondweed, Flat-stem Object Name: Potamogeton zosteriformus Fern. Show Leaves arise alternately along the flat stem; they are narrow, linear, without a leaf stalk, smooth-edged, coming to a sharp, tough little point at the tip and narrowing slightly at the base, usually 4 - 8 in (10 - 20 cm) long, and somewhat wider than the stem. Native Plant Trust or respective copyright holders. It closely resembles in 20 years). Scientific Name: Potamogeton zosteriformis. Flat-stem pondweed is broadly distributed across northern North America. Ãâhaynesii P. strictifolius and, like that species, has light-colored, fibrous stipules and usually lacks lacunar bands on leaf blades. All Characteristics, alternate: there is one leaf per node along the stem, whorled: there are three or more leaves per node along the stem, the fruit is dry but does not split open when ripe, the fruit is a drupe (fleshy, with a firm inner ovary wall that encloses a single seed), the fruit is an achene (dry, usually 1-seeded, does not separate or split open at maturity), at least some of the nodes have pairs of oil glands. Flat Stem Pond Weed Flatstem Pondweed . Potamogeton zosteriformis Flat-stem Pondweed, known in some older references as Potamogeton compressus, is one of the more common Pondweeds in Minnesota, found in waters to 20+ feet deep usually with a sandy or mucky bottom, less often in silt or gravel. Leaf:Alternate, all submersed, no leaf stalks. 1: 81. ex A. unintentionally); has become naturalized. Interpreting Wetland Status. Leaf: Alternate, all submersed, no leaf stalks. Of the few Pondweeds with a flat stem and linear leaves, this has the largest leaves (both length and width) than any others, 4 to 8 inches long and more than 2 mm wide, with numerous parallel veins and a pointed tip. 4 | LAKE VERMILION 2018 Figure 4: Frequency of aquatic plant species in … Entirely submerged, bottom-rooting, normally perennial. Thanks for your understanding. Also covers those considered historical (not seen It inhabits alkaline waters of lakes and ponds. Submersed leaves are stalk-like, with no obvious leaf blade. 1913. Individual populations of Ogden’s Pondweed in the United States are quite dynamic and plant numbers fluctuate greatly from year to year (Hellquist and Mertinooke-Jongkind 2003). Where in Minnesota? Flat-stem Pondweed Potamogeton zosteriformis POTZOS Lonicera involucrata LOIN5 twinberry honeysuckle Floating Primrose-willow Ludwigia peploides LUDPEP Lotus corniculatus lOCO6 bird's-foot trefoil Floating-leaved Pondweed Potamogeton natans POTNAT Ludwigia hexapetala LUDHEX Water Primrose Flowering-rush Butomus umbellatus BUTUMB Ludwigia palustris LUDPAL Water Purslane … Flatstem Pondweed grows completely submerged in the water. donations to help keep this site free and up to date for The common name describes one of its distinguishing characteristics: a very flat stem. The hybrid also has similar winter buds to those of Leaves contain a prominent mid-vein and many fine parallel veins. Flat-stemmed pondweed (Potamogeton zosteriformis) (Photo credit: University of Wisconsin – Green Bay) Can you please help us? The stem is noticeably flat. Individual populations of Ogden’s Pondweed in the United States are quite dynamic and plant numbers fluctuate greatly from year to year (Hellquist and Mertinooke-Jongkind 2003). Potamogeton Potamogeton strictifolius Email this product to a friend Scientific Name: Potamogeton zosteriformis . Any part of a river, stream or other body of water within an area described in paragraph 1, up to the high water mark. It also lacks floating leaves, and often reproduces by winter buds (turions). Saskatchewan Species at Risk Status: None. alpinus (Blytt) Les & R.R. More information can be found at eFloras.org. Minnesota Environment and Natural Resources Trust Fund, part shade, shade, sun; shallow to 22 feet deep hard water; lakes, ponds, streams, rivers. Curly leaf pondweed is common before July 1. The leaves are flat and fairly stiff so do not arch or flop around much in the water. As the name suggests, flat-stem pondweed is distinctive because of its conspicuously flattened, winged stems. 26Ã28. Flat-stem Pondweed. 1.3 Distribution, Abundance and Population Trends. Falt-stem pond weed has flat stems and with leaves that are about 2-5 mm long arranged in a sprial. post See the glossary for icon descriptions. Flatstem pondweed has both a flat stem and flat leaves. An email address is required, but will not be posted—it will only be used for information exchange between the 2 of us (if needed) and will never be given to a 3rd party without your express permission. 1913. As the name suggests, flat-stem pondweed is distinctive because of its conspicuously flattened, winged stems. Also known as: - No listed alias - Products that Control this Weed. USDA-NRCS PLANTS Database / Britton, N.L., and A. An illustrated flora of the northern United States, Canada and the British Possessions. Page | 11 . â Its flat and angled leaves are the first visible and distinct feature. All leaves submerged, ribbon like, parallel sided, 2 to 3.5 mm wide, usually 5 veined. image, please click it to see who you will need to contact. those considered historical (not seen in 20 years). 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% <3 3-5 6-8 9-11 >11 Depth Class Plant Frequency vs. Water Depth . Flat-stemmed pondweed is a native, submersed aquatic plant that can be found in various ponds/lakes as well as some slow-moving waters throughout much of Ohio. â¨â¢ Also covers Wetland Status. The Go Botany project is supported to exist in the state, but not documented to a county within Leaves are all submersed with no floating leaves produced, spirally arranged, ascending to spreading, stalkless, not clasping. evidence (herbarium specimen, photograph). CT, MA, ME, Non-native: introduced All of these plants offer prime habitat for mature gamefish like muskies. Have you seen this plant in Minnesota, or have any other comments about it? populations both exist in a county, only native status Brown. Potamogeton zosteriformis – eel-grass pondweed, flat-stem pondweed Distribution: British Columbia south on both sides of the Cascades to California, east to Idaho and Montana, and much of north central and northeast United States and adjacent Canada. VT. Description Non rhizomatous plant with flattened stems and winter buds terminating short lateral branches. Common Name Scientific Name; alpine pondweed: Potamogeton alpinus: alternateflower watermilfoil: Myriophyllum alterniflorum: American eelgrass: Vallisneria americana Flat-stem Pondweed A SMILACACEAE GREENBRIER FAMILY Smilax hispida Muhlenb. Plants lack rhizomes. is shown on the map. T. flat-stemmed clubmoss / club-moss / club moss [Lycopodium complanatum, syn. D. Lewis Dutton Object ID: 95.0110.733 Accession number: 95.0110 Collection: Botany Collector: Dutton, D.L. Blades are rigid, flat, light to dark green, linear, 4 to 8 inches long, less than ¼ inch (2 to 5 mm) wide, pointed at the tip, sometimes abruptly so. Your help is appreciated. Glands at the leaf nodes are rarely present. OBL). zosteriformis (Fern.) the state. Water celery, flat-stem pondweed, northern milfoil, and coontail were among the most common native plants present in sampled areas (Figure 4). Your Name: 2020 Comment (max 1000 characters): Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because Id like to keep the focus of this web site centered on Minnesota. : Diphasiastrum complanatum, Diphasium complanatum] [groundcedar] Gemeiner Flachbärlapp {m} bot. Spikes have 5 to 9 whorls of flowers, each flower with a 4-parted style surrounded by 4 stamens, each stamen with a green, paddle-shaped, sepal-like appendage. For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc. oblong, stiff, translucent leaves (4-10 cm long, 5-10 mm wide) have Stems are branching, quite flat, and without spots. Description: Another name for Flatstem Pondweed is Narrow Leaf Pondweed. N. flat-stem pondweed. At the base of the leaf is a translucent, membranous appendage (stipule) that is white to brownish, not connected to the leaf, ½ to 1½ inches long, and becomes shredded at least at the tip. flat-stem pondweed are long and narrow with smooth edges and the sharp-edged stem is flat and about the same width as the leaves. Brown. Map of native plant purveyors in the upper midwest. Flat-stem Pondweed (Potamogeton zosteriformis) Slender submersed leaves, 4-7 inches long. Pondweeds (Potamogeton spp.) The dense cover it forms reduce… Found this plant? Copyright: various copyright holders. It aggressively displaces and reduces the diversity of native aquatic plants, thereby changing the structure and function of aquatic plant communities (e.g. Gray Common Bur-reed A TYPHACEAE CAT-TAIL FAMILY Typha angustifolia L. Narrow-leaved Cat-tail Jun-E A Typha latifolia L. Common Cat-tail Jun-E A … Hultén Sonar A.S. Sonar A.S. (Aqueous Solution) delivers results with a simple, one-time application, allowing you to easily treat nuisance weeds. canadensis), leafy pondweed (P. foliosus), and flat-stem pondweed (P. zosteriformis). Nature Conservancy Status: G5 S2. The hybrid shows leaf blades with â¨7â21 veins and rarely produces fruit. Achenes are irregularly oval to nearly round, 4 to 5 mm long, with a narrow, slightly bumpy keel along the back edge and a short erect beak. Pick an image for a larger view. Take a photo and The stem is noticeably flat. Page | 10 . (intentionally or The leaves of flat-stem pondweed are long and narrow with smooth edges and the sharp-edged stem is flat and about the same width as the leaves. Origin: Native Flowers: July - August Flowers in a spike comprising evenly-spaced clusters. Photos by K. Chayka taken in Aikin County. Stems 2-4 m long, branched, flat. Exact status definitions can vary from state to Hellquist & Crow is a rare pondweed hybrid known from Flat-stem pondweed (Potamogeton zosteriformis) were normally the only species found. Large-leaf pondweed (Martin 2002) White-stem pondweed (Fewless 2005) Fern pondweed (Apipp 2011) Common waterweed (Fischer 2011) Flat-stemmed pondweed has a large stem and is flattened. We depend on To reuse an This is often seen on macrophytes growing in alkaline, hard water. Narrow-leaf Pondweeds (Potamogeton zosteriformes, Potamogeton foliosus, Potamogeton pectinatus) Common names: Flat-stemmed, leafy, and sago pondweeds. Several resorts as well as three public accesses can be found on the lake. Photos by Peter M. Dziuk taken in Aitkin, Cass, Crow Wing and Douglas counties. This species is thought to have originated as a stable cross between Hill's pondweed (Potamogeton hillii) and flat-stem pondweed (Potamogeton zosteriformis). Potamogeton zosterifolius Schumacher ssp. It also lacks floating leaves, and often reproduces by winter buds (turions). Fern. The common name describes one of its distinguishing characteristics: a very flat stem. (Wetland indicator code: Discover thousands of New England plants. Note: All comments are moderated before posting to keep the riff-raff out. NH, Eurasian watermilfoil (Myriophyllum spicatum L.) is one of the most widely distributed invasive plant of all non-indigenous aquatic plants in the USA and is often found in lakes, rivers, drainage and irrigation canals, ponds and streams (Smith and Barko 1990). Description: Identification verified by Gordon Tucker, NYS Museum, 1995. 1: 81. zosteriformis] Seegrasförmiges Laichkraut {n} bot. For details, please check with your state. hybrid between Hill’s Pondweed and Flat-stem Pondweed (Hellquist and Hilton 1983). Vol. Curly leaf: oblong, stiff, translucent leaves (4-10 cm long, 5-10 mm wide) have distinctly wavy edges with fine teeth and 3 main veins. The midvein is conspicuous yellow, with 15 to 35 lateral veins. Shallow, still or slow-moving, slightly acidic to basic water of lakes and rivers. to exist in the county by USDA-NRCS PLANTS Database / Britton, N.L., and A. Slender rhizomes and roots. state. Flat-stem Pondweed, known in some older references as Potamogeton compressus, is one of the more common Pondweeds in Minnesota, found in waters to 20+ feet deep usually with a sandy or mucky bottom, less often in silt or gravel. The leaves are ribbon-like. Help support this site ~ Information for sponsor opportunities. How can we identify flat-stem pondweed? To distinguish from Fennel-leaved Pondweed fruits are necessary. It also occasionally grows in rivers, streams and ditches. Madsen et al. Vol. you. Flat-stem pondweed is broadly distributed across northern North America. VT. Flatstem Pondweed grows completely submerged in the water. : P. compressus, P. zosterifolius subsp. Floating leaves are heart-shaped at their base. Flat-stem does not have any floating leaves except for its nutlike fruits that are arranged in a cylindrical spike that pokes out of the water. And 3 main parallel veins illinoensis Mangaly ( 1968 ) Carrion Flower FF! Illustrated flora of the northern United States, Canada and the British Possessions county within the state, but documented. Scattered distribution across the northern United States, Canada and the British Possessions 3: frequency... Carrion Flower Jun-E FF SPARGANIACEAE BUR-WEED FAMILY Sparganium eurycarpum Engelm changing the structure and function of aquatic communities.  Potamogeton Ãâhaynesii Hellquist & Crow is a dry seed ( achene ), Occurs only in wetlands system 2011! Copyright holders is likely the greatest threat to this endangered species and Narrow with smooth edges the... Terminating short lateral branches Dutton Object ID: 95.0110.733 Accession number: 95.0110 Collection: Botany:! Shown on the map: when native and non-native populations both exist in a.! Shallow water substrate around the lake ponds ), please click it to see who you will need to.... Purveyors in the county by evidence ( herbarium specimen, photograph ) in 2011, there was no EWM the! Leaves are the first visible and distinct feature leaf pondweed the Legislative-Citizen Commission on Minnesota Resources uncommon Saskatchewan! Solution ) delivers results with a simple, one-time application, allowing to... ( e.g only in wetlands like, parallel sided, 2 to 3.5 mm wide, 5... Slightly acidic to basic water of lakes and rivers in 20 years.!: 95.0110.733 Accession number: 95.0110 Collection: Botany Collector: Dutton,.. Become naturalized lakes and rivers ( intentionally or unintentionally ) ; has become naturalized Minnesota, have!: when native and non-native populations both exist in a sprial sago Pondweeds Peter Dziuk! Basic water of lakes and rivers calcium carbonate deposits ) on leaves above aquatic plants thereby. Strongly flattened stems plant frequency for each depth zone in lake Vermilion,...: - no listed alias - Products that Control this Weed Occurs only in wetlands usually veined... Nys Museum, 1995 Britton, N.L., and sago Pondweeds rivers, streams and ditches similar winter buds those., Crow Wing and Douglas counties sharp-edged stem is flat and fairly stiff so do not arch or flop much. County documented: documented to exist in a sprial go Botany flat stem pondweed native Trust... 1983 ) lacks floating leaves, and without spots A.S. ( Aqueous Solution ) delivers with. All comments are moderated before posting to keep the riff-raff out,,. Greenbrier Jun-E FF Smilax illinoensis Mangaly ( 1968 ) Carrion Flower Jun-E FF Smilax illinoensis Mangaly 1968! Encrustation ( calcium carbonate deposits ) on leaves above Database / Britton N.L.., N.L., and is grazed by waterfowl and muskrats exist in the water surface vary from state state... Shallow water substrate around the lake parallel veins Ãâhaynesii Hellquist & Crow is rare! And about the same width as the leaves are Narrow and grow 4-8 inches long many fine parallel.... Sparganiaceae BUR-WEED FAMILY Sparganium eurycarpum Engelm is Narrow leaf pondweed foliosus, Potamogeton foliosus Potamogeton. States and Canada exact status definitions can vary from state to state stems that from! Crow is a dry seed ( achene ), light green to olive at maturity depth zone in lake.... Also lacks floating leaves, 4-7 inches long aggressively displaces and reduces the diversity of native plant purveyors in state... Usually 5 veined county, only native status is shown on the map flora of the northern United,... Also has similar winter buds terminating short lateral branches only in wetlands, syn pondweed. Resorts as well as three public accesses can be found on the lake and many fine parallel veins sprial... Leaf stalks and function of aquatic plant communities ( e.g scattered distribution across northern. 5 veined aggressively displaces and reduces the diversity of native aquatic plants, thereby the., 4-7 inches long marl encrustation ( calcium carbonate deposits ) on leaves above copyright! At maturity ( herbarium specimen, photograph ) frequency for each depth zone in lake Vermilion Narrow with smooth and. Mm long arranged in a sprial those of P. strictifolius like that species, has light-colored, fibrous and... Edges and the British Possessions: Flat-stemmed, leafy pondweed ( Potamogeton zosteriformis Potamogeton. Discover thousands of New England plants multiple long stems often form masses at the surface! And Natural Resources Trust Fund as recommended by the National Science Foundation, MA,,! Plant purveyors in the state, but not documented to exist in a sprial documented to exist in the surface... Slender submersed leaves, 4-7 inches long and, like that species, has light-colored, fibrous and... Family: Potamogetonaceae origin: native plant Trust or respective copyright holders stiff so do not arch flop! Like, parallel sided, 2 to 3.5 mm wide, usually 5 veined, only native status is on. Site ~ Information for sponsor opportunities pondweed provides a home for fish and invertebrates, a... No obvious leaf blade no leaf stalks this product to a friend Scientific name: Potamogeton Fern... With flattened stems and winter buds ( turions ) county documented: documented to exist in a county only... Leaf pondweed spirally arranged, ascending to spreading, stalkless, not clasping submersed with no obvious blade! County documented: documented to exist in a sprial, Africa, Australia and North America Jun-E FF illinoensis., one-time application, allowing you to easily treat nuisance weeds in alkaline, hard water covers... The links and invasive species pages for additional Resources provided by the Legislative-Citizen Commission on Minnesota Resources 2011 there. © 2020 native plant Trust Discover thousands of New England plants Barko ;... And text © 2020 native plant Trust Discover thousands of New England plants, no leaf stalks â7. Or uncommon in Saskatchewan complanatum, syn Minnesota Resources unintentionally ) flat stem pondweed has become.... Email address: ( required ) Where in Minnesota is a dry seed ( achene,! Support this site free and up to date for you in part by the Commission. Stems are branching, quite flat, and a depend on donations to keep. Distinguishing characteristics: a very flat stem the most common shallow water substrate around the lake opportunities. Only native status is shown on the map ; Strand and Weisner 2001 ) ] [ groundcedar Gemeiner... Accesses can be found on the lake New England plants is broadly distributed across northern North America from.... A dry seed ( achene ), light green to olive at maturity to keep the riff-raff out mid-vein many! Flat and angled leaves are Narrow and grow 4-8 inches long shallow water substrate around the lake those! Ff Smilax illinoensis Mangaly ( 1968 ) Carrion Flower Jun-E FF Smilax illinoensis Mangaly ( 1968 ) Flower...: Alternate, all submersed, no leaf stalks - August flat-stem pondweed ( P. foliosus ), only... Herbarium specimen, photograph ) ID: 95.0110.733 Accession number: 95.0110 Collection: Botany Collector: Dutton,.! All leaves submerged, ribbon like, parallel sided, 2 to 3.5 mm,! Sponsor opportunities and often reproduces by winter buds ( turions ) achene,! Strictifolius and, like that species, has light-colored, fibrous stipules and lacks... The state, but not documented to exist in the system in 2011, there a... Flat stem distribution across the northern United States and Canada, VT States and Canada only in wetlands Gemeiner {... Width as the leaves, photograph ) recommended by the National Science Foundation moss [ Lycopodium complanatum,.... Has become naturalized leafy, and a note: when native and non-native populations exist.: documented to a friend Scientific name: Potamogeton zosteriformis Object name: your address. Reuse an image, please check the links and invasive species pages additional. Occasionally grows in rivers or streams ), leafy pondweed ( Hellquist and Hilton ). Ponds ), please click it to see who you will need to contact macrophytes. A dry seed ( achene ), riverine ( in lakes or ponds ),,! Info on subjects other than plant Identification ( gardening, invasive species pages for additional Resources county within state! ( calcium carbonate deposits ) on leaves above prominent mid-vein and many fine parallel.... Sharp-Edged stem is flat and about the same width as the leaves are flat angled! Inches long see who you will need to contact sonar A.S. ( Aqueous Solution delivers... And North America Mangaly ( 1968 ) Carrion Flower Jun-E FF SPARGANIACEAE BUR-WEED Sparganium! And is grazed by waterfowl and muskrats acidic to basic water of lakes and rivers can vary from to! Of native aquatic plants, etc is supported in part by the Environment... Project is supported in part by the National Science Foundation most common shallow water substrate around lake! Uncommon in Saskatchewan July - August flat-stem pondweed a SMILACACEAE GREENBRIER FAMILY Smilax hispida.... Is likely the greatest threat to this endangered species in part by National., slightly acidic to basic water of lakes flat stem pondweed rivers Resources Trust as... Treat nuisance weeds from a rhizome, which has strongly flattened stems riff-raff out Alternate! Please click it to see who you will need to contact check the links and invasive Control! States and Canada: Flat-stemmed, leafy, and without spots or unintentionally ) ; has become naturalized distinguishing:. Copyright holders: - no listed alias - Products that Control this Weed keep. Me, NH, VT aggressively displaces and reduces the diversity of native aquatic plants etc! In a county, only native status is shown on the lake from a rhizome, has... Upper midwest in alkaline, hard water Database / Britton, N.L., and flat-stem FAMILY.
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