I know that many would say that one should not talk about Pound, because he is a bad thinker, and look instead at his colleagues. But, they are far more accessible -- this is a classic imagist poem, one phenonema.
No allusion to other things. A common sight behind any hospital.
the back wingsof thehospital wherenothingwill grow liecindersin which shinethe brokenpieces of a greenbottleWilliam Carlos Williams
I prefer Pound at his most obscure.