The apparition of these faces in the crowd :
Petals on a wet, black bough .
In "In a Station of the Metro," the white spaces may carry more content than the black words. Ezra Pound used white spaces within lines instead of line or stanza breaks to indicate the linear movement of a train from which he was observing things that passed. Faces were blurred, appearing as "apparition." Upon passing a tree, first the petals of the flowers at the end of the branch were observed, then the black bough. The space before the period at the end of the poem indicates that the train moved on, but the observer stopped recording observations at that point as it passed through the station.