tree-weed

A tree or large shrub that is sometimes difficult to keep out of seldom mowed lawns and often ignored gardens. They commonly grow fast from seed, re-sprout from cut stumps, or spread underground with runner roots.

Sally: That maple stump send up a new crop of shoots on ya?

Susie: Ya, grows like a regular tree-weed. I'm gonna have to get dirty and dig the whole stump up.