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 |  |  |  |  |  |   |  hydrilla  |  George Washington Memorial Parkway  |  |   |   |   | Record Status: Approved  |  Occurrence:  | Probably Present  |  Nativeness:  | Native  |  Abundance:  |   |  |   |  Scientific Name with Authority:  | Hydrilla verticillata (L. f.) Royle  |  Park Preferred Common Name(s):  |  |  Park Synonyms:  |  |  |   |   | Kingdom Plantae, Phylum Tracheophyta, Subphylum Spermatophytina, Order Alismatales, Family Hydrocharitaceae, Genus Hydrilla, Species Hydrilla verticillata  |  
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 |  |  |  |  |  Threatened/Endangered Status:  |   |  State Species of Concern Status:  |   |  Ozone-sensitive Status:  |   |  NatureServe Global Rank:  | GNR  |  NatureServe State Rank:  | DC: SNA; MD: SNA; VA: SNA  |  Evidence:  | 2 Observations, 1 Vouchers, 2 Data Store References, 0 External Links  |  
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 |  |  |  Other Parks Where Species is Listed:  |   |  Amistad National Recreation Area  | Big Cypress National Preserve  |  Canaveral National Seashore  | Chesapeake and Ohio Canal National Historical Park  |  Everglades National Park  | Great Falls Park  |  Jean Lafitte National Historical Park and Preserve  | Obed Wild and Scenic River  |  Piscataway Park  | Prince William Forest Park  |  San Antonio Missions National Historical Park  |   |  
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 |  |  |  |  |  |  Last Modified Date:  | 2/12/2007  |   |  
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 |  | NPSpecies - The National Park Service biodiversity database.  IRMA Portal version.https://irma.nps.gov/npspecies.  Accessed 11/4/2025 5:44:06 AM  |  
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 | NatureServe Global Rank and State Rank  NatureServe. 2017. NatureServe Web Service. Arlington, VA. U.S.A. Available http://services.natureserve.org. Accessed: 12/4/2017. Updated quarterly. This information is provided by NatureServe (www.natureserve.org) and its network of natural heritage member programs, a leading source of information about rare and endangered species, and threatened ecosystems.  |  
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