Reference to the context of " In a Station of the Metro"

Though short, this poem is very sensory in nature; it allows the reader to imagine a scene while reading the lines. Through Pound's economical description of these faces as "petals on a wet, black bough," he is able to invoke a transient tone. Check this out:

https://www.gradesaver.com/ezra-pound-poems/study-guide/summary-in-a-station-of-the-metro-1913