Specimen Information

Egeria densa
Egeria densa
(Brazilian waterweed)

Specimen ID1257369
Common NameBrazilian waterweed
LocalityLacamas Lake
Mapping AccuracyAccurate
HUC8 NameLower Columbia-Sandy
HUC8 Number17080001
HUC10 NameWashougal River
HUC10 Number1708000106
HUC12 NameLacamas Creek
HUC12 Number170800010605
Collection Day30
Collection Month8
Collection Year2008
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
Commentsin water > 2 m deep, not flowering; Weather breezy, overcast. Saw osprey, mystery snails. Water greenish, level looks normal. Elodea canadensis very dense in water < 2 m deep, egeria denser in deeper water - but well below the surface and not flowering. Both species have patches with leaves mostly gone or brown/black. Sent a sample of the egeria to Shearer at USACOE for pathogen analysis.
Record TypeLiterature


The data represented on this site vary in accuracy, scale, completeness, extent of coverage and origin. It is the user's responsibility to use these data consistent with their intended purpose and within stated limitations. We highly recommend reviewing metadata files prior to interpreting these data.

Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [5/26/2024].

Contact us if you are using data from this site for a publication to make sure the data are being used appropriately and for potential co-authorship if warranted.

For general information and questions about the database, contact Wesley Daniel. For problems and technical issues, contact Matthew Neilson.