Day 189: Two species of Burdock are known to occur in western Washington, Arctium lappa (Greater/Great Burdock) and Arctium minus (Lesser/Common Burdock). Both are introduced species and are considered invasives. As one might expect from the name, Common Burdock is the most frequently seen of the two. Both species have thick, strong taproots which, if you've ever tried to dig one out, you'll have discovered is anchored near its geographically antipodean point. The hooked burrs of this plant were the inspiration for Velcro, and anyone encountering the fresh or dry plant should take pains to "de-seed" themselves before leaving the area. Green burrs may mature off the plant wherever they happen to detach from an unwitting carrier.
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