The purplish bouquets are surrounded by rigid black-tipped bracts; Therefore the noticed physical appearance. The priority: This Eurasian transplant tends to dominate a place, cutting down plant diversity. A knapweed infestation may also raise surface area operate-off and sedimentation. This weed spreads conveniently in hay and on undercarriages of vehicles. http://connerobozk.free-blogz.com/12826226/the-smart-trick-of-weed-seeds-idaho-that-no-one-is-discussing