Scientific Name: Hydrilla verticillata. http://www.imapinvasives.org/GIST/ESA/esapages/documnts/hydrver.pdf, Northeast Aquatic Nuisance Species Panel: Hydrilla Profile Page See also: Included on California's noxious weed list; see. U.S. Cooperative Extension. Alaska Center for Conservation Science. It was sold as an aquarium plant, which may have been the origin of its initial introduction into natural water systems. It was brought over to the United States in 1950 from aquariums in Florida. History: This noxious weed is native to Asia, Europe, Africa and Australia. The District provides assistance on Pymatuning Lake which borders Pennsylvania and Ohio, and at Raystown Lake in south central Pennsylvania. The Plants Database includes the following 1 species of Hydrilla . California county polygons can be turned off and on in the layer control box. Nonnative Fresh Water Plant: Hydrocharitaceae- Washington State Department of Ecology Stems are slender and can grow up to 9 m long. Introduction. Leaves are whorled in bunches of three to eight, but most often with whorls of five. Hydrilla verticillata is it- in Hyderabad W2 IMG 8305.jpg 809 × 600; 173 KB Hydrilla verticillata kz01 01.jpg 2,874 × 3,831; 1.73 MB Hydrilla verticillata kz01 02.jpg 3,072 × 4,608; 2.67 MB Native to: India (Hydrilla verticillata’s dioecious type originates from southern India. Common Names. Notes. For many plants, the website displays maps showing physiographic provinces within the Carolinas and Georgia where the plant has been documented. Common Names: Hydrilla, Water Thyme. Common Name: hydrilla, esthwaite waterweed Family Name: Hydrocharitaceae - Frogbit family Native Range: Asia NJ Status: Emerging Stage 1 – Rare (may be locally common). National Invasive Species Information Center, Early Detection & Distribution Mapping System (EDDMapS) - Hydrilla, Nonindigenous Aquatic Species Database: Point Map - Hydrilla, YouTube - Hydrilla Hazard: Biology, Impacts and Management of an Invasive Aquatic Plant, Fact Sheet: Hydrilla (Apr 2016) (PDF | 496 KB), Invasive Plants of California's Wildlands -, Invasive Plants of California's Wildlands, Southeast Exotic Pest Plant Council Invasive Plant Manual - Hydrilla, Alaska Exotic Plants Information Clearinghouse (AKEPIC): Species Biography - Hydrilla (Feb 7, 2011) (PDF | 113 KB). Click below on a thumbnail map or name for species profiles. Common Name(s): Hydrilla, water thyme, Florida elodea, waterweed. : not known to be. Its appearance is variable depending on the growing conditions. Invasive Species: Hydrilla verticillata, Hydrilla . Hydrilla verticllata (Hydrilla) has had a wide range of positive and negative economic impacts in the Chesapeake Bay region, particularly in the Potomac River. Center for Invasive Species and Ecosystem Health. It is hardy to zone (UK) 5. Plants can survive in depths up to 40 ft. (12 m) in non-turbid water. pronounced: hid-ril-lah ver-ti-ki-lah-ta from: hydr (G.): water verticillus (L.): the whorl of a spindle “water plant with whorls of leaves” Synonymy. The website also provides access to a database and images of herbarium specimens found at the University of South Florida and other herbaria. ITIS (Integrated Taxonomic Information System), 2005. Hydrilla is an aquatic plant and member of the Hydrocharitaceae or Frog’s-bit family. YouTube; Cornell University. APNI* Seripicula verticillata L.f. APNI* Udora australis F.Muell. Back to albums list Hydrilla verticillata hydrilla. Notes on Taxonomy and Nomenclature Top of page. See the invasive alert on the Invasive Plant Atlas of New England website: http://nbii-nin.ciesin.columbia.edu/ipane/invasivealerts/invasives_hydrilla.htm, Habitat: Additional comments Hydrilla verticillata is the only species in this genus.Hydrilla is a very fast growing plant which quickly outcompetes other plant species. Hydrilla verticillata is a ANNUAL/PERENNIAL at a fast rate. California Department of Food and Agriculture. Online Database Hydrilla verticillata Summary: An online database that provides taxonomic information, common names, synonyms and geographical jurisdiction of a species. Where found. It may be monoecious or dioecious. Hydrilla verticillata might be confused with at least two other submersed, long-stemmed plants having small narrow leaves (e.g., Elodea canadensis and Egeria densa). Hydrilla can spread rapidly and disrupts native submersed aquatic plant communities. However, it is now listed by the federal government, and most states, as a noxious weed. 1. Introduction. ¼ inch long turions are vegetative buds produced in the axils of the leaves. The Plants Database includes the following 1 species of Hydrilla . It is established in 12 US states (USGS Florida Caribbean Science Center 2000). (Figure 5), 4 to 8 leaves are arranged in a whorl (leaves radiate from a single point on the stem) (Figure 5). 3. Hydrilla stems are slender, branched up to 25 feet long. http://nbii-nin.ciesin.columbia.edu/ipane/invasivealerts/invasives_hydrilla.htm, http://www.ecy.wa.gov/programs/wq/plants/weeds/aqua008.html, http://www.mass.gov/eea/docs/dcr/watersupply/lakepond/factsheet/hydrilla.pdf, http://www.eddmaps.org/distribution/usstate.cfm?sub=3028, http://www.imapinvasives.org/GIST/ESA/esapages/documnts/hydrver.pdf, http://www.northeastans.org/hydrilla/hydrillaprofile.htm, http://www.sms.si.edu/irlspec/Hydrilla_verticillata.htm, A submersed water plant with long stems (up to 25 feet in length) which branches profusely at the surface. 1990), other researches suggest that fish populations are adversely affected when hydrilla coverage exceeds 30% (Colle and Shireman 1980). Extensive growth of this plant quickly chokes waterways, limiting their use by people. Additional Listing: Federally listed noxious weed, quarantine list (WAC 16-752) Images: Left. 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