What myths or legends help you appreciate the content in the poem?
In Ezra Pound's poem "In a Station of the Metro" it helps to know that Persephone, the goddess of flowers, lived with her handmaidens in the underworld for six months of the year, and their faces had the gentleness and colorfulness of flowers.
In A Station of the Metro
The apparition of these faces in the crowd;
Petals on a wet, black bough.