Willow trunk 

"Willow Trunk" is a pencil drawing by Friedrich Wilhelm Hirt, currently housed in the Städel Museum. The artwork features a detailed depiction of a willow tree trunk, capturing its unique gnarled texture and intricate branching patterns. Hirt's meticulous lines and shading create a sense of depth and realism, emphasizing the natural beauty of the subject matter. The drawing showcases Hirt's mastery of observational drawing and his interest in the intricacies of the natural world.