| Scientific Name | Carex filifolia Nutt. var. filifolia |
| Family | Cyperaceae |
| Common Names | thread-leaf sedge |
| Eastern Washington | Native |
| Synonyms | None |
| Conservation Status | |
| Notes |
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Along Stromberger Rd. W of Hwy 23 in Crab Cr Can, NW of Ritzville, WA; 47 18 994N 118 07 814W – Lincoln Co. – 6/7/2011 
Along Stromberger Rd. W of Hwy 23 in Crab Cr Can, NW of Ritzville, WA; 47 18 994N 118 07 814W – Lincoln Co. – 6/7/2011 
Along Stromberger Rd. W of Hwy 23 in Crab Cr Can, NW of Ritzville, WA; 47 18 994N 118 07 814W – Lincoln Co. – 6/7/2011 
Ca. 2 mi W of Cheney, WA along Hwy 904; N 47.46809 W 117.63419; Spokane Co.; 6/15/2012 
Ca. 2 mi W of Cheney, WA along Hwy 904; N 47.46809 W 117.63419; Spokane Co.; 6/15/2012 
Ca. 2 mi W of Cheney, WA along Hwy 904; N 47.46809 W 117.63419; Spokane Co.; 6/15/2012 
Ca. 2 mi W of Cheney, WA along Hwy 904; N 47.46809 W 117.63419; Spokane Co.; 6/15/2012 
W of Cheney, WA, ca 1.5 mi W of Mullinix Rd; N 47.46696 W 117.63879; Spokane Co.; 5/27/2014 
W of Cheney, WA, ca 1.5 mi W of Mullinix Rd; N 47.46696 W 117.63879; Spokane Co.; 5/27/2014 
W of Cheney, WA, ca 1.5 mi W of Mullinix Rd; N 47.46696 W 117.63879; Spokane Co.; 5/27/2014 
W of Cheney, WA, ca 1.5 mi W of Mullinix Rd; N 47.46696 W 117.63879; Spokane Co.; 5/27/2014