Dense waterweed egeria densa is highly invasive in the usa, where it forms dense monospecific surface mats that restrict water movement, trap sediment, and cause fluctuations in water quality. Brazilian waterweed resources national invasive species. Po box 315, twin bridges, mt 59754 406 6845590 888 6644153 fax becky l. While very pervasive in neighboring states, brazilian waterweed is not yet very prominent in wisconsin. The exotic egeria is also known as brazilian elodea. Foliage the finely serrated leaves are usually less than 1 in. Grows rooted in mud, submerged or floating, with stems up to fifteen feet long, 18 inch thick. Dense waterweed egeria densa summary egeria densa is a submerged, freshwater plant native to south america.
Infestations can alter aquatic ecosystems, trapping sediment and degrading water quality. Brazilian waterweed home san francisco estuary institute. Beautiful light to bright green leaves, with branching, stems covered in bunches of linear, whorled leaves. Invasive plant fact sheets for plant species trees, shrubs, vines, herbs and aquatic plants that have impacted the states natural lands. Mdard weed risk assessment for brazilian elodea egeria densa this document evaluates the invasive potential of the plant species using information based on establishment, spread and potential to. In addition, the need of a hand lens to see teeth on leaf margins distinguishes brazilian waterweed and the native waterweeds as well from hydrilla which has teeth that may be seen without a hand lens if one looks closely. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Brazilian waterweed forms dense, tangled mats at the surface.
Brazilian elodea can be found in ponds, lakes, and sluggish rivers and streams. Egeria densa is an aquatic plant in the waterweed family that inhabits. Brazilian elodea invasive species alert printable pdf. The leaf margins have very fine saw teeth that require a magnifying lens to see. Brazilian elodea has finely toothed leaves that are bright green, bushy, and usually arranged in whorls of four around the stem.
Brazilian waterweed pdf 540 kb pennsylvania department of conservation and natural resources. Brazilian waterweed synonyms, brazilian waterweed pronunciation, brazilian waterweed translation, english dictionary definition of brazilian waterweed. This plant can live rooted or free floating at depths of up to 20 feet. John, leafy elodea, dense waterweed, brazilian elodea.
Leaves typically longer than 34 distinguish brazilian waterweed from the native waterweeds and hydrilla. The slender stems of egeria are usually a foot or two long, but can be much longer. The small leaves are strapshaped, about one inch long and 14 inch wide. Stems are cylindrical and can be simple or branching. It grows in thick mats of intertwining stems parsons and cuthbertson 2001, which alter the light and nutrients available to the biota where it. This plant can be considered a nuisance and has the potential to flourish in the lowsalinity tidal waters of the chesapeake bay. Practical guidebook to the control of invasive aquatic and wetland plants of the san francisco bay delta region. Virginia tech weed id guide illinoisindiana sea grant. Brazilian waterweed is currently present in many parts of the us including the nearby states of new hampshire, massachusetts, vermont and new york. The leaves are bright to dark green, bladeshaped, with very fine teeth on the leaf margins that are only visible with magnification. Brazilian waterweed definition of brazilian waterweed by.
Subscribe to americas largest dictionary and get thousands more definitions and advanced searchad free. John, leafy elodea, dense waterweed, brazilian elodea kristian peters commons. Brazilian elodea is a submerged perennial that can reach lengths of 2. Egeria densa brazilian waterweed nc invasive plant council. It is extensively sold in the aquarium industry usually under the name anacharis. Dense stands of brazilian waterweed can restrict water movement, trap sediment and affect water quality. This page was last edited on 6 december 2014, at 05. This submersed plant is rooted, but pieces of it may be found drifting in the water. Anacharis is an excellent nutrient controller and oxygen producer for all types. Brazilian elodea is still sold in some areas as an aquarium plant, and it was probably introduced to washington waters by careless dumping of aquariums. Risk analysis of the brazilian waterweed egeria densa planch. The firm, crisp stem has relatively few branches and grows to 6 ft 1. Brazilian waterweed, also known as egeria densa, is frequently used in aquariums by newcomers to the fishkeeping hobby.
Files are available under licenses specified on their description page. How to tell brazilian elodea and canadian waterweed apart brazilian elodea egeria densa is often confused with canadian waterweed elodea canadensis, as they look nearly identical. Brazilian waterweed, sometimes referred to as brazilian elodea when it was thought to be in the elodea genus, is a submerged aquatic plant. South american waterweed, elodea b designated weed south american waterweed, elodea. Egeria densa cannot tolerate high light intensities or high levels of ultraviolet and blue light, as it experiences chlorophyll damage to light levels of 1250 lux. A one year grace period is included in the regulations for japanese barberry berberis thunbergii, during which existing stock of. In new zealand, it has also been observed to rapidly recolonise devegetated waterways following floods. It is considered a problematic invasive species due to its use in home aquariums and subsequent release into nonnative habitats. Brazilian elodea how to care for brazilian waterweed.
Invasive species egeria densa watch list prohibited in michigan brazilian elodea is a bushy. Find more of our publications and books at extensionpubs. This submerged perennial can survive rooted or free floating in freshwater. Effect of operating temperature on anaerobic digestion of the brazilian waterweed egeria densa and its microbial community article in anaerobe 47 march 2017 with 26 reads how we measure reads. It forms dense mats that shade out other native aquatic plants, inhibits water flow, and recreational activities. Weeds in australia dense waterweed egeria densa australian government.
Egeria densa is an ageless aquarium plant, a species of egeria native to warm temperate south america in southeastern brazil, argentina, and uruguay and become naturalized and invasive in many warm temperate to subtropical regions of the world, including europe, southern africa, asia, australia, new zealand and north america. Areas on the stems known as double nodes play an important role in. Egeria densa ufifas center for aquatic and invasive plants. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Grows from erect, cylindrical stems until it reaches the surface of the water, where it then forms dense mats. South america central minas gerais region of brazil, coast of.
Brazilian waterweed is a popular aquarium plant, sometimes sold under the name anacharis. However, brazilian elodea has four leaves per whorl and each leaf is usually around 0. Hydrilla produces tubers and turions while brazilian waterweed does not. However, it is not a legal authority for statutory or regulatory purposes. Executive office montana weed control association, inc. It can live rooted or free floating at depths of up to 6 m. Learn the translation for waterweed in leo s english. A species profile for brazilian waterweed, brazilian elodea, dense waterweed, leafy elodea from usda. Often confused with hydrilla, egeria densa has a smooth midrib on the underside of the leaf, whereas hydrilla has small teeth.
Brazilian waterweed, dense waterweed, leafy elodea. Anacharis, also known as the brazilian waterweed or egeria densa. It has several other common names, including brazilian waterweed, south american waterweed, and anacharis. Egeria densa is an aquatic plant in the waterweed family that inhabits mild to warm freshwaters, such as slowflowing streams in warm, temperate, and tropical regions parsons and cuthbertson 2001. Hosted by the usgs core science analytics and synthesis. Information on description, economic importance, distribution, habitat, history, growth, and impacts and management of species. This should be seen in the context of wto and free trade as a principle in the eu baker et al. When researching egeria densa i found many websites with the same information but there a few that conflicted with each other and thats when it got confusing. It grows in thick mats of intertwining stems parsons and cuthbertson 2001, which alter the light and nutrients available to the biota where it occurs. Waterweed article about waterweed by the free dictionary. Pdf risk analysis of the brazilian waterweed egeria densa.
Egeria densa is an invasive plant that has negative impacts on water bodies and is spread by humans. Brazilian waterweed egeria densa at hoogeveen, the netherlands photo. The slender stems of egeria are usually a foot or two. Common waterweed egeria densa egeria densa is not native to florida.
Introduced as an aquarium plant during the 1900s and still on sale today. Brazilian waterweed, dense waterweed, leafy elodea leslie j. Pdf risk analysis of the brazilian waterweed egeria. The bay grass key was designed to allow you to identify most species of bay grasses found in maryland. Egeria densa planch waterweed, egeria, brazilian elodea, anachris. Plants profile for egeria densa brazilian waterweed. For information about umaine extension programs and resources, visit extension. Waterweed definition is any of various floating or submerged aquatic plants such as elodea having usually inconspicuous flowers. It also has been introduced into new zealand, australia, denmark, germany, france, japan and chile. This plant may be known by one or more common names in different places, and some are listed above. Anacharis egeria densa apf free shipping live aquatic plants. Aquatic invaders a sea grantaza partnership 1 brazilian elodea egeria densa virginia tech weed id guide u. All structured data from the file and property namespaces is available under the creative commons cc0 license. This submerged perennial can survive rooted or free floating in freshwater depths up to 20 feet.
It is very popular as an aquarium plant and has been transported across the world for this use. What species have grace periods established in the regulations. Egeria densa, the largeflowered waterweed or brazilian waterweed, is a species of egeria native to warm temperate south america in southeastern brazil, argentina, and uruguay. Brazilian elodea can be found in ponds, lakes, and sluggish.
It forms dense mats which take over native plant habitat and degrade waterfowl and fish habitat. While its considered an invasive plant out in nature, it can make for a great. Egeria densa is a submersed aquatic plant that invades freshwater systems throughout much of the united states. With nounverb tables for the different cases and tenses links to audio pronunciation and relevant forum discussions free. King county best management practices for brazilian elodea. Brazilian elodea, also known as brazilian waterweed, is a leafy, submerged aquatic. South american waterweed this plant and synonym italicized and indented above can be weedy or invasive according to the authoritative sources noted below. Anacharis anchors itself in the substrate by its roots, but will also grow when floating.
A comparison of brazilian elodea and canadian waterweed. Brazilian elodea egeria densa not detected in michigan identification. Brazilian elodea is an ornamental aquatic plant that is used primarily for fish aquariums. Egeria densa is a popular aquarium plant that is often sold as anacharis. Egeria densa cannot tolerate high uvb radiation, as it can damage the enzymes involved in photosynthesis and can reduce photosynthetic capacity casati et al. Waterweed definition of waterweed by merriamwebster. So, some parts of researching this species were difficult and others were very easy. Egeria densa is a dioecious, submersed perennial found in lentic and lotic freshwater systems. Although bay grasses are notoriously difficult to identify using standard taxonomic keys, the flexible format of the internet allows us to combine detailed pictures, simple line drawings and text messages in a stepwise sequence that makes identifying bay grasses simple.
Brazilian waterweed montana weed control association. Brazilian elodea is a submerged perennial that looks similar to american waterweed elodea canadensis, a common native aquatic plant. Brazilian waterweed, egeria densa frogsbit family pdf developed by the maine natural areas program and university of maine cooperative extension. Utilizing differential quantitative mapping technologies. Brazilian waterweed or wideleaf anacharis egeria densa submersed, perennial, freshwater herb. Brazilian waterweed is a popular aquarium plant that can create dense mats in the wild. Effect of operating temperature on anaerobic digestion of. Knowledge document for risk analysis of the nonnative brazilian. An exotic invasive plant egeria densa description egeria densa is a robust submerged aggressive invasive aquatic plant. Page designed through the cooperative efforts of interagency itis teams. Risk analysis report of nonnative organisms in belgium from the royal belgian institute of natural sciences for the federal public. Rooted, robust submersed invasive plant wellsuited to life in the ssjd imported from south america disease free and insect free for the aquarium trade few natural predators to keep growth in check low light requirements forms dense surface mats that shade out other submersed vegetation.
Egeria densa brazilian elodea is in the frogbit family, hydrocharitaceae. Invasive species brazilian elodea state of michigan. Brazilian waterweed is a rooted, submersed perennial. They have slender stems and small spikes of inconspicuous flowers appearing above the water. Pdf egeria densa is a south american aquatic plant species considered highly. Search results relating to videos and pdf documents were.