What metaphors are used in Poetry by Marianne Moore?

The speaker insists that poetry should combine both imagination and reality. She illustrates this point by saying that true poetry is able to present "imaginary gardens with real toads in them." This metaphor has become one of the most widely cited metaphors for poetry. Ironically, through the speaker's exploration of what is "derivative" and "unintelligible" in poetry, this poem proves the merits of poetry. It offers the very model of what "genuine" poetry is, and it exemplifies how valuable good poetry can be.