Specimen Information

Hydrilla verticillata verticillata
Hydrilla verticillata verticillata
(whorled hydrilla)

Specimen ID1407109
Common Namewhorled hydrilla
LocalityAdjacent to the left descending bank of Cypress Creek approximately 300 feet downstream from the Nelson Rivers Starkey Bridge on Waterloo Road (County Road 14)
Mapping AccuracyAccurate
HUC8 NamePickwick Lake
HUC8 Number06030005
HUC10 NameCypress Creek
HUC10 Number0603000506
HUC12 NameCox Creek-Cypress Creek
HUC12 Number060300050605
Collection Day6
Collection Month6
Collection Year2017
Year AccuracyActual
Potential Pathwayreleased aquarium
CommentsI have fished in this area and at other locations within Cypress Creek for over 10 years and this is the first occurrence of this species that I have noted. I did not take a photograph, since I was wading in the creek and did not wish to risk getting my camera wet. This infestation was dense and lush, occupying approximately 80 square feet and growing in an area approximately 2.5 feet deep. I am a retired biologist and have carried out numerous exotic plant surveys. in conjunction with my employment with the U.S. Fish and Wildlife Service (USFWS) and in the private consulting field. I taught a course in aquatic plant identification in a course for USFWS biologists. I am submitting a second report for an observation in Cypress Creek upstream from this one.
Record TypeNAS sighting report


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Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [2/22/2024].

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