Leaves of Grass, first published in 1855, began as Walt Whitman's collection of twelve unnamed poems, unique for their irregular line lengths and lack of rhyme. Whitman spent the remainder of his life re-writing the work, and republished the collection several times until it finally numbered over 400 poems. Leaves of Grass represents Whitman's views on life and philosophy, and love, and features some of his best known and loved poems including "O...