Read the excerpt from the poem “barbara frietchie.” up from the meadows rich with corn, clear in the cool september morn, the clustered spires of frederick stand green-walled by the hills of maryland. what makes these rhyming couplets? the words in each line present a complete thought. the words “rich,” “cool,” and “green-walled” describe the setting. the words “clear” and “cool” start with the same letter. the words at the end of each set sound alike.