Specimen Information

Najas minor
Najas minor
(brittle waternymph)

Specimen ID1685294
Common Namebrittle waternymph
LocalityLake Ann, Carver County
Mapping AccuracyAccurate
HUC8 NameLower Minnesota
HUC8 Number07020012
HUC10 NameMinnesota River
HUC10 Number0702001211
HUC12 NameRiley Creek
HUC12 Number070200121103
Collection Day2
Collection Month8
Collection Year2017
Year AccuracyActual
Potential Pathwayunknown
Reference 1
Ref. Number:24369
Author:Center for Invasive Species and Ecosystem Health.
Title:EDDMapS: Early detection and distribution mapping system
Publisher:The University of Georgia
CommentsBrittle Naiad (Najas minor) was observed on August 2, 2017 by Claire Bleser (RPBCWD) in Lake Ann, Carver County (DOW 0001200). Additionally, James Johnson with Freshwater Science conducted a survey and concluded the infestation was localized to a 10 ft x10 ft dense patch in the north-east corner of the lake. The exact location of the infestation was noted by Freshwater Science (see map 1 below). The presence of this plant was then reported to the MnDNR on the same day, August 2, 2017. Suspected plants had highly toothed leaves (3-12 teeth) and displayed several leaves at each node, synonymous with Brittle Naiad characteristics (see Photo 1 & 2 below). A rapid response is being implemented for the isolated dense patch and may be treated with pesticides in the near future. The lake was reported in the EDDMaps system on August 11, 2017. Lake Ann will be added to the MNDNR Designated Infested Waters list as infested with Brittle Naiad.
Record TypeLiterature


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Citation information: U.S. Geological Survey. [2024]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [7/23/2024].

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