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Filtering by: Creator Butler, Tim, 1958 Creator French, Ken

Problem thistles of Oregon

Creator:

French, Ken, Burrill, L. C., Butler, Tim, 1958-, and Oregon State University. Extension Service

Abstract:

These thistles are native to Europe and the Middle East. Some are not true thistles; for example, purple/Iberian and yellow starthistle actually are knapweeds. All of these plants, however, share a spiny, thorny, invasive nature and long-lasting, hard seed. These traits make people who use or manage land for recreation,...

Resource Type:

Technical Report