willow dock

Rumex salicifolius is a species of flowering plant in the knotweed family known by the common names willow dock and willow-leaved dock. It is native to much of western North America and it can be found in parts of Europe as an introduced species and a roadside weed. It is an extremely variable plant which is generally divided into many varieties, some of which may actually be specimens of other species. In general, it is a...