Najas graminea
(ricefield waternymph)

13 results for Najas graminea (ricefield waternymph)
Download Data

Specimen IDStateCountyLocalityYear HUC Number What's this? Drainage nameStatus
229184 CA Sacramento Valley1979 18020100 Lower Sacramentoestablished
1436511 CAButte#833 Irrigation Ditch, near caretaker´┐Żs house, Greylodge Game Refuge, Butte Sink.1946 18020158 Butte Creekestablished
237939 CAButte3.5 mi NNW of Rice Experiment Station, on s side of Hwy 1621991 18020158 Butte Creekcollected
237940 CAButte3.5 mi NNW of Rice Experiment Station, on s side of Hwy 1621991 18020158 Butte Creekcollected
1436538 CAButteca. 2 mi. e. Honcut (between 2 large reservoirs, Joie Osgood Ranch); Joie Osgood Ranch1991 18020159 Honcut Headwaters-Lower Featherestablished
237941 CAButteGray Lodge Waterfowl Management Area (formerly Greylodge Game Refuge)1946 18020158 Butte Creekcollected
1436524 CAButteGreylodge Game Refuge, near caretaker's house Greylodge Game Refuge1946 18020158 Butte Creekestablished
1436140 CAButteJoie Osgood Ranch, about 2 miles east of Honcut.1991 18020159 Honcut Headwaters-Lower Featherestablished
237937 CAButteReservoir about 2 miles east of Honcut1991 18020159 Honcut Headwaters-Lower Feathercollected
1436608 CAButteRice Experiment Station on the south side of Highway 162, ca. 3.5 mi north-northwest of Biggs.1991 18020158 Butte Creekestablished
237938 CAButteSacramento River National Wildlife Refuge, Llano Seco Unit1996 18020158 Butte Creekcollected
1436101 CAButteU.S. Fish and Wildlife Service parcel between Seven Mile Lane and Sacramento River (on the s side of Tract 3.1, Sanctuary II); Sacramento River National Wildlife Refuge, Llano Seco Unit1996 18020158 Butte Creekestablished
1436155 CAColusaBLM Payne Ranch, lands to the southwest of the junction of Hwys 16 and 20. Western edge of ranch on ridge above Cache Creek Canyon2008 18020116 Upper Cacheestablished

Data Disclaimer: Number of records does not imply species abundance. This summary represent collection records only and may not reflect the actual distribution of established populations. These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the U.S. Geological Survey (USGS) and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.


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. [2023]. Nonindigenous Aquatic Species Database. Gainesville, Florida. Accessed [10/3/2023].

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.