Weeds-- squarrose knapweed, Centaurea virgata Lam. ssp. squarrosa Gugl.
By: C. Roché and L.C. Burrill.
Contributors: Washington State University. Cooperative Extension Service.
Series: PNW -- 422.; PNW (Series) -- 422.
Publisher: Washington State University Extension Service
Published: 1992
Place of publication: [Pullman, Wash.]
Language: eng
Notes: "June 1992."