Jun. 30, 2017
Canada thistle, Cirsium arvense
When you see large patches of pink along the road, this is a likely suspect. As pretty as that is, Canada thistle is one of the bad guys. Perhaps that's why it has adopted such a misleading alias. Where it came from in Europe, it is called creeping thistle. Any gardener can tell you how it lurks around, suddenly shooting up nasty sprouts wherever they find opportunities. The root systems are extensive and dense, crowding their neighbors. Getting rid of it is almost impossible, and can produce a lot of collateral damage. But it none the less gives us eye catching patches of color along our roads. It grows in every state except FL, GA, HI, GA, LA, MS, OK, SC, TX, and LB. Lenawee Co MI, 6/21/11.