Bishop's weed often appears on lists of ground cover plants that love shade ... part of the country or world you're in; ...

Giant hogweed is sometimes confused with cow parsnip or poison hemlock ... in the United States as a noxious weed. Direct contact with the plant’s sap may result in burns.

A weed is simply a plant that is growing where it is not wanted ... Weeds such as wild carrot, cow parsley and celery grow at least 350 seeds on a single flower-head. Wild clematis grows climbing ...