Specimen Information

Egeria densa
Egeria densa
(Brazilian waterweed)

Specimen ID1257311
Common NameBrazilian waterweed
LocalitySammamish River
Mapping AccuracyAccurate
HUC8 NameLake Washington
HUC8 Number17110012
HUC10 NameMiddle Sammamish River
HUC10 Number1711001203
HUC12 NameBear Creek-Sammamish River
HUC12 Number171100120304
Collection Day26
Collection Month6
Collection Year2015
Year AccuracyActual
Potential Pathwayunknown
Reference 1
Ref. Number:28080
Author:Environmental Assessment Program.
Title:Washington State Lakes Environmental Data Version 1.0
Publisher:Washington State Department of Ecology
Commentsblooming, very dense in upper river, not in lower sections yet; Weather clear, hot, light breeze. Carried boat to water at Marymoor Park, just upstream of the bridge, to launch. Took out at Kenmoor, where the river meets Lake Washington. Motored quickly between 6 stations, where we did transects with the hydroacoustic mapping tool. Saw many geese along the way. Very dense Egeria growth at the upper end. The lower river is canal-like, with more turbid water. Water level very low.
Record TypeLiterature


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Citation information: U.S. Geological Survey. [2022]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [12/5/2022].

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