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Identification of Knapweeds and Starthistles in the PNW PNW0432   An identification key and detailed line drawings of bracts, seeds, heads, rosettes, and plant shape offer an important tool for identifying these invasive plants. About 20 species of Centaurea have naturalized in western North America. Publisher: Pacific Northwest Cooperative Extension Publications Published: June 1999.   Revised: June 2000.   26 pages.   In Stock         Purchase: Free Download: Price: $1.50  See also...  How to Identify Rhododendron and Azalea Problems More Info Our Price: $6.00  Growing Christmas Trees in the Pacific Northwest More Info Our Price: $6.50  Plants of the Pacific Northwest, Interactive Keys and Color Photos (CD) More Info Our Price: $300.00

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