| Scientific Name | Centaurea diffusa Lam. |
| Family | Asteraceae |
| Common Names | diffuse knapweed, tumble knapweed, white knapweed |
| Eastern Washington | Introduced |
| Synonyms | None |
| Conservation Status | |
| Notes |
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Usk to Chewelah rd; 48 17 602N 117 25 325W; 1 mi e of Bartlette rd – Stevens CO., WA – 7/26/2009 
Usk to Chewelah rd; 48 17 602N 117 25 325W; 1 mi e of Bartlette rd – Stevens CO., WA – 7/26/2009 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
Usk to Chewelah rd; 48 17 602N 117 25 325W; 1 mi e of Bartlette rd – Stevens CO., WA – 7/26/2009 
Same site – 7/26/2009 — Centaurea diffusa and C. stoebe (C. maculosa) compared 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
10.75 air mi WSW of Kettle Falls, WA near the north base of Huckleberry Mt.; N 48.57644 W 118.28471; Ferry Co.; 7/19/2015 
10.75 air mi WSW of Kettle Falls, WA near the north base of Huckleberry Mt.; N 48.57644 W 118.28471; Ferry Co.; 7/19/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015 
0.2 mi W of Hwy 97 along Dallasport rd; N of the Dalles, OR; N 45.61347 W 121.14751; Klickitat Co.; 6/12/2015