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www.invasivespeciesinfo.gov/...spotknapweed.shtml - Cached
This link has been bookmarked by 2 people . It was first bookmarked on 25 Jun 2008, by Sheryl A. McCoy.
a basic scientific profile of this invasive species and what can be done to prevent or eradicate it; even though this species is not a spiny thistle, it is a thistle species. Therefore, it will spread rapidly.
noxious weed star thistle cornflower Centaurea Eurasia botany science biebersteinii
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