1 hour ago · Life · 0 comments

I visited my parents in Iowa last week. One thing I did was help with pulling out thistles that had been spreading throughout a couple garden beds — 89 plants one day, a couple more another day. But what kind of thistle were they? I was hoping non-native since my hope is to nudge things in the direction of native plants. Per a user on iNaturalist, they seem to be Creeping Thistle (Cirsium arvense). Wikipedia says: “Cirsium arvense is a perennial species of flowering plant in the family Asteraceae, native throughout Europe and western Asia, northern Africa and widely introduced elsewhere… Creeping thistle is a herbaceous perennial plant growing up to 150 cm, forming extensive clonal colonies from thickened roots that send up numerous erect shoots during the growing season… Given its adaptive nature, Cirsium arvense is one of the worst invasive weeds worldwide… differs from other native North American species in having large roots and multiple small flower heads on a branched stem.”…

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