Sour Grapes (1921)
by
William Carlos Williams

Epitaph

An old willow with hollow branches
slowly swayed his few high gright tendrils
and sang:

Love is a young green willow
shimmering at the bare wood's edge.

Sources:

Public domain text taken from The Poets’ Corner:
http://www.theotherpages.org/poems/wcw-sg2.html#30