prose poem

noun1

1. •
   A literary text written in the manner of prose—without the fixed lines, rhyme, and meter often characteristic of poetry—but nonetheless clearly possessing some of the distinctive attributes of poetry, such as lyrical language, evocation of feeling, vivid imagery, metaphor, and linguistic devices like assonance or alliteration.

   • "He is the author of a very wild Mystery, or dramatic prose-poem, in which the Ocean, Mont-Blanc, and the Cathedral of Strassburg have parts to play." — 1839