What literary form is Edmond Rostand best known for writing?

Edmond Rostand is best known for his contributions to the theatrical world, particularly in the realm of plays. His most famous work, "Cyrano de Bergerac," showcases his skill in combining poetic language with dramatic storytelling, making it a hallmark of French theatre. Rostand's impact on the genre of drama is significant, as he is often associated with the revival of romanticism in the theater, an era that emphasizes emotion and individualism. His works are characterized by their rich language, compelling characters, and exploration of themes such as love, honor, and identity, which are all prominent in the form of plays he wrote.

This is why the identification of Rostand with plays is accurate and highlights his prominence as a playwright in literary history.