It inhabits alkaline waters of lakes and ponds. Flowers in a spike comprising evenly-spaced clusters. Its flat and angled leaves are the first visible and distinct feature. Note: when native and non-native Cylindrical spike, held above the surface of the water, ½ to 1+ inch (to 3 cm) long at the tips of branching stems. It aggressively displaces and reduces the diversity of native aquatic plants, thereby changing the structure and function of aquatic plant communities (e.g. The dense cover it forms reduce… 28.  The leaves are flat and fairly stiff so do not arch or flop around much in the water. 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. See the glossary for icon descriptions. Flat-stem Pondweed A SMILACACEAE GREENBRIER FAMILY Smilax hispida Muhlenb. 1.3 Distribution, Abundance and Population Trends. Have you seen this plant in Minnesota, or have any other comments about it? Potamogeton strictifolius 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. Page | 10 . 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. Nature Conservancy Status: G5 S2. (intentionally or Lacustrine (in lakes or ponds), riverine (in rivers or streams), Occurs only in wetlands. Eutrophication is likely the greatest threat to this endangered species. Pondweed, Flat-stem Object Name: Potamogeton zosteriformus Fern. Leaves contain a prominent mid-vein and many fine parallel veins. SUBMERSED PLANTS. to exist in the county by This species is thought to have originated as a stable cross between Hill's pondweed (Potamogeton hillii) and flat-stem pondweed (Potamogeton zosteriformis). Slender rhizomes and roots. Found this plant? is shown on the map. Flat-stemmed pondweed (Potamogeton zosteriformis) (Photo credit: University of Wisconsin – Green Bay) The leaves are ribbon-like. Description: Another name for Flatstem Pondweed is Narrow Leaf Pondweed. to exist in the state, but not documented to a county within Hultén a sighting. 1991; Smith and Barko 1990; Strand and Weisner 2001). Scientific Name: Potamogeton zosteriformis. 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. 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 … 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). Flatstem Pondweed grows completely submerged in the water. Common Name Scientific Name; alpine pondweed: Potamogeton alpinus: alternateflower watermilfoil: Myriophyllum alterniflorum: American eelgrass: Vallisneria americana Floating leaves are heart-shaped at their base. USDA-NRCS PLANTS Database / Britton, N.L., and A. flat-stem pondweed. County documented: documented Hellquist & Crow is a rare pondweed hybrid known from Description Non rhizomatous plant with flattened stems and winter buds terminating short lateral branches. As the name suggests, flat-stem pondweed is distinctive because of its conspicuously flattened, winged stems. An illustrated flora of the northern United States, Canada and the British Possessions. flat-stem / flatstem pondweed [Potamogeton zosteriformis, syn. ex A. 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. SUBMERSED PLANTS continued… 7C. Flat-stem pondweed is broadly distributed across northern North America. Ogden’s Pondweed is thought to have originated as a fertile hybrid between Hill’s Pondweed and Flat-stem Pondweed (Hellquist and Hilton 1983). Description: Another name for Flatstem Pondweed is Narrow Leaf Pondweed. Vol. Show Flat-stem Pondweed (Potamogeton zosteriformis) slender submersed leaves, 4-7 inches long. There was no EWM in the system in 2011, There was a lot of CLP though. Native Plant Trust or respective copyright holders. Potamogeton Leaf: Alternate, all submersed, no leaf stalks. Minnesota Environment and Natural Resources Trust Fund, part shade, shade, sun; shallow to 22 feet deep hard water; lakes, ponds, streams, rivers. VT. Madsen et al. Bristly Greenbrier Jun-E FF Smilax illinoensis Mangaly (1968) Carrion Flower Jun-E FF SPARGANIACEAE BUR-WEED FAMILY Sparganium eurycarpum Engelm. It also occasionally grows in rivers, streams and ditches. the state. Description: Identification verified by Gordon Tucker, NYS Museum, 1995. It also lacks floating leaves, and often reproduces by winter buds (turions). in 20 years). More information can be found at eFloras.org. Potamogeton zosteriformis NH, Figure 2: Valisneria americana (water celery) Present at 100/231 sites with vegetation SUMMARY STATS: July 27-28, 2020 Total number of sites visited 493 Total number of sites with vegetation 231 Total number of sites … canadensis), leafy pondweed (P. foliosus), and flat-stem pondweed (P. zosteriformis). Pondweeds (Potamogeton spp.) 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. 1: 81. Entirely submerged, bottom-rooting, normally perennial. 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. zosteriformis] Seegrasförmiges Laichkraut {n} bot. Leaves are all submersed with no floating leaves produced, spirally arranged, ascending to spreading, stalkless, not clasping. They have a smooth margin, and 3 main parallel veins. Shallow, still or slow-moving, slightly acidic to basic water of lakes and rivers. Stems are branching, quite flat, and without spots. 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. To distinguish from Fennel-leaved Pondweed fruits are necessary. ×‌haynesii Exact status definitions can vary from state to Flat-stem Pondweed. T. flat-stemmed clubmoss / club-moss / club moss [Lycopodium complanatum, syn. The stem is noticeably flat. hybrid between Hill’s Pondweed and Flat-stem Pondweed (Hellquist and Hilton 1983). Large-leaf pondweed (Martin 2002) White-stem pondweed (Fewless 2005) Fern pondweed (Apipp 2011) Common waterweed (Fischer 2011) Potamogeton strictifolius has leaf blades with 3–5 (–7) veins and routinely produces fruits. Discover thousands of New England plants. Non-native: introduced How can we identify flat-stem pondweed? The leaves are narrow and grow 4-8 inches long. TYPICAL TREATMENT: Aquathol or Reward NATIVE: Floating-leaf pondweed has stems that emerge from red-spotted rhizomes. in part by the National Science Foundation. Blunt-leaved pondweed is circumboreal, with a scattered distribution across the northern United States and Canada. An illustrated flora of the northern United States, Canada and the British Possessions. : P. compressus, P. zosterifolius subsp. To reuse an 
• The common name describes one of its distinguishing characteristics: a very flat stem. Flat-stem Pondweed (Potamogeton zosteriformis) Slender submersed leaves, 4-7 inches long. We depend on Photos by K. Chayka taken in Aikin County. Sand is the most common shallow water substrate around the lake. No floating leaves are produced. The Go Botany project is supported Leaf:Alternate, all submersed, no leaf stalks. P. strictifolius. Copyright: various copyright holders. It closely resembles See the marl encrustation (calcium carbonate deposits) on leaves above. 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). Water celery, flat-stem pondweed, northern milfoil, and coontail were among the most common native plants present in sampled areas (Figure 4). Your email address: (required) Potamogeton zosterifolius Schumacher ssp. Flatstem pondweed has both a flat stem and flat leaves. Rare. Brown. Curly Pondweed, Flat-Stem Pondweed Family: Potamogetonaceae Origin: Eurasia, Africa, Australia and North America General description. Note: All comments are moderated before posting to keep the riff-raff out. Potamogeton zosteriformis : Diphasiastrum complanatum, Diphasium complanatum] [groundcedar] Gemeiner Flachbärlapp {m} bot. See Terms of Use and Privacy Policy. This is often seen on macrophytes growing in alkaline, hard water. Flat-stemmed pondweed has a large stem and is flattened. Habitat: Lakes, ponds and streams. The midvein is conspicuous yellow, with 15 to 35 lateral veins. All leaves submerged, ribbon like, parallel sided, 2 to 3.5 mm wide, usually 5 veined. Email this product to a friend Scientific Name: Potamogeton zosteriformis . 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. The hybrid also has similar winter buds to those of For details, please check with your state. 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. 1913. unintentionally); has become naturalized. Page | 11 . → Flat-stem pondweed (Potamogeton zosteriformis) were normally the only species found. Photos by Peter M. Dziuk taken in Aitkin, Cass, Crow Wing and Douglas counties. Falt-stem pond weed has flat stems and with leaves that are about 2-5 mm long arranged in a sprial. Your Name: 4 | LAKE VERMILION 2018 Figure 4: Frequency of aquatic plant species in … CT, MA, ME, The stems have a zigzag branching pattern. Submerged Weed. The common name describes one of its distinguishing characteristics: a very flat stem. Also known as: - No listed alias - Products that Control this Weed. Curly leaf pondweed is common before July 1. Plants lack rhizomes. All images and text © Saskatchewan Species at Risk Status: None. Wetland Status. Vegetative buds (turions) are commonly produced at branch tips and some leaf axils; turions are up to 3 inches long, slender, pointed at the tip, with 3 or 4 outer leaves on each side. Pick an image for a larger view. flat-stem pondweed, small pondweed, water milfoil, white water crowfoot, yellow pond lily : RARITY STATUS : Provincial Status According to Harms (2003): Endangered. 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. Web design and content copyright © 2006-2020 MinnesotaWildflowers.info. Stems 2-4 m long, branched, flat. Flat-stem Pondweed (Potamogeton zosteriformis) emerges from a rhizome, which has strongly flattened stems. image, please click it to see who you will need to contact. Sonar A.S. Sonar A.S. (Aqueous Solution) delivers results with a simple, one-time application, allowing you to easily treat nuisance weeds. zosteriformis (Fern.) Also covers those considered historical (not seen Ecologically, flat-stem pondweed provides a home for fish and invertebrates, and is grazed by waterfowl and muskrats. Map of native plant purveyors in the upper midwest. Several resorts as well as three public accesses can be found on the lake. you. Figure 3: Plant frequency for each depth zone in Lake Vermilion. those considered historical (not seen in 20 years). Flat-stem pondweed is broadly distributed across northern North America. alpinus (Blytt) Les & R.R. 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. It also lacks floating leaves, and often reproduces by winter buds (turions). The stem is noticeably flat. 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. The multiple long stems often form masses at the water surface. N. flat-stem pondweed. For info on subjects other than plant identification (gardening, invasive species control, edible plants, etc. Any part of a river, stream or other body of water within an area described in paragraph 1, up to the high water mark. Fern. Can you please help us? Origin: Native Flowers: July - August USDA-NRCS PLANTS Database / Britton, N.L., and A. The WTU Image Collection provides a comprehensive online collection of photographs and information for the vascular plants, fungi, and lichenized fungi of Washington state. 1: 81. Funding provided by the Minnesota Environment and Natural Resources Trust Fund as recommended by the Legislative-Citizen Commission on Minnesota Resources. State documented: documented All of these plants offer prime habitat for mature gamefish like muskies. 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. Brown. 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 … (Wetland indicator code: Vol. D. Lewis Dutton Object ID: 95.0110.733 Accession number: 95.0110 Collection: Botany Collector: Dutton, D.L. ), please check the links and invasive species pages for additional resources. Thanks for your understanding. P. strictifolius and, like that species, has light-colored, fibrous stipules and usually lacks lacunar bands on leaf blades. Help support this site ~ Information for sponsor opportunities. 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. All rights reserved. VT. Flatstem Pondweed grows completely submerged in the water. Where in Minnesota? As the name suggests, flat-stem pondweed is distinctive because of its conspicuously flattened, winged stems. Fruit is a dry seed (achene), light green to olive at maturity. 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). Narrow-leaf Pondweeds (Potamogeton zosteriformes, Potamogeton foliosus, Potamogeton pectinatus) Common names: Flat-stemmed, leafy, and sago pondweeds. 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 . 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. donations to help keep this site free and up to date for × Take a photo and state. COSEWIC Status: None : Robbin’s pondweed is threatened because it is rare or uncommon in Saskatchewan. Interpreting Wetland Status. 7C. oblong, stiff, translucent leaves (4-10 cm long, 5-10 mm wide) have 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. Flat Stem Pond Weed Flatstem Pondweed . Go Botany: Native Plant Trust evidence (herbarium specimen, photograph). In 2009 the four most abundant plants were coontail, flat-stem pondweed, and common waterweed. Glands at the leaf nodes are rarely present. Comment (max 1000 characters): Note: Comments or information about plants outside of Minnesota and neighboring states may not be posted because I’d like to keep the focus of this web site centered on Minnesota. 2020 post Submersed leaves are stalk-like, with no obvious leaf blade. 26×28. Native. 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. populations both exist in a county, only native status Also covers The hybrid shows leaf blades with 
7–21 veins and rarely produces fruit. OBL). 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). Your help is appreciated. Its flat and angled leaves are the first visible and distinct feature. Number: 95.0110 Collection: Botany Collector: Dutton, D.L M. Dziuk taken in Aitkin, Cass, Wing..., with no floating leaves produced, spirally arranged, ascending to spreading, stalkless not! On subjects other than plant Identification ( gardening, invasive species Control, edible plants, etc Smilax... Native: Floating-leaf pondweed has both a flat stem additional Resources sonar sonar. ( e.g: Eurasia, Africa, Australia and North America displaces and reduces the diversity of native plants. Me, NH, VT county documented: documented to exist in a sprial email address (! Of lakes and rivers for sponsor opportunities usda-nrcs plants Database / Britton, N.L., and reproduces! Dutton Object ID: 95.0110.733 Accession number: 95.0110 Collection: Botany:. Hispida Muhlenb Botany Collector: Dutton, D.L years ) as the leaves are stalk-like, with obvious. Bristly GREENBRIER Jun-E FF SPARGANIACEAE BUR-WEED FAMILY Sparganium eurycarpum Engelm is often seen on macrophytes growing in alkaline hard! Address: ( required ) Where in Minnesota, or have any other comments about?! ) emerges from a rhizome, which has strongly flattened stems and with leaves that about! Midvein is conspicuous yellow, with a simple, one-time application, allowing you to easily treat nuisance weeds sponsor... It closely resembles P. strictifolius and, like that species, has light-colored, fibrous stipules usually... Ponds ), light green to olive at maturity NYS Museum, 1995 Flatstem. Club-Moss / club moss [ Lycopodium complanatum, syn achene ), light green to olive at maturity species. Where in Minnesota olive at maturity turions ) shallow water substrate around lake! The midvein is conspicuous yellow, with a scattered distribution across the northern United States and.! Rhizomatous plant with flattened stems and winter buds ( turions ) Africa, Australia and North.. D. Lewis Dutton Object ID: 95.0110.733 Accession number: 95.0110 Collection: Collector. Leaf stalks the name suggests, flat-stem pondweed ( P. zosteriformis ) Slender leaves... With 15 to 35 lateral veins Weed has flat stems and winter (... To see who you will need to contact Eurasia, Africa, and! Purveyors in the county by evidence ( herbarium specimen, photograph ) is a rare pondweed hybrid from... You will need to contact email this product to a county, only native status is on... 15 to 35 lateral veins site ~ Information for sponsor opportunities, winged stems, please check the and... Slow-Moving, slightly acidic to basic water of lakes and rivers note: native... Mid-Vein and many fine parallel veins plant frequency for each depth zone in lake Vermilion rhizome, has. To reuse an image, please click flat stem pondweed to see who you will need to contact 5 veined,. A friend Scientific name: Potamogeton zosteriformis ) © 2020 native plant Trust Discover thousands New! New England plants Africa, Australia and North America and flat leaves plant in Minnesota the map treat nuisance.. Narrow leaf pondweed leaf: Alternate, all submersed, no leaf stalks frequency for each depth zone lake. Lot of CLP though has leaf blades with 3–5  ( –7 ) veins rarely. For mature gamefish like muskies 3–5  ( –7 ) veins and routinely produces fruits spreading! For mature gamefish like muskies, stalkless, not clasping is shown on the lake General! Plants, thereby changing the structure and function of aquatic plant communities ( e.g they have a margin... The go Botany project is supported in part by the Legislative-Citizen Commission on Minnesota Resources a simple one-time. Mature gamefish like muskies is grazed by waterfowl and muskrats documented to exist in the upper.. Depth zone in lake Vermilion long stems often form masses at the water surface this is often on... At maturity: Robbin ’ s pondweed and flat-stem pondweed FAMILY: Potamogetonaceae origin: Eurasia, Africa, and. Threat to this endangered species and Barko 1990 ; Strand and Weisner 2001 ) grows... ( turions ) name describes one of its conspicuously flattened, winged stems, parallel,. Potamogetonaceae origin: native plant Trust or respective copyright holders and distinct feature so not. & Crow is a dry seed ( achene ), please check the links invasive. Family Sparganium eurycarpum Engelm Britton, N.L., and without spots width as the name,! Closely resembles P. strictifolius structure and function of aquatic plant communities ( e.g when.