Short-fringed knapweed (Centaura nigrescens Willd., C. dubia Suter in Flora of the Pacific Northwest)
By: [by Cindy Roché].
Contributors: Washington State University. Cooperative Extension.; Oregon State University. Extension Service.; University of Idaho. Cooperative Extension System.; United States. Dept. of Agriculture.
Series: Weeds; PNW -- 417.; PNW (Series) -- 417.
Publisher: Washington State University Cooperative Extension; Oregon State University Extension Service; University of Idaho Cooperative Extension System; U.S. Dept. of Agriculture
Published: 1992
Place of publication: [Olympia, Wash.]; [Corvallis, Or.]; [Moscow, Idaho]; [Washington, D.C.]
Language: eng
Subjects: Knapweeds -- Northwestern States; Knapweeds -- Control
Other titles: Centaura nigrescens Willd., C. dubia Suter in Flora of the Pacific Northwest.
Notes: Title from caption.

"Published June 1992"--P. 2.

"A Pacific Northwest extension publication."