The painting "Green Hills" by Henri Masson, created in 1950, showcases a vivid and dynamic landscape scene. Masson, a Canadian artist, was known for his expressive and colorful landscapes, and this painting is characteristic of his style.

The composition is a vibrant depiction of rolling hills, with varying shades of green suggesting the lushness of the countryside. The strokes are bold and impasto, which give the piece a sense of movement and vitality. The landscape is structured with patches of light and dark greens, indicating the play of sunlight and shadow across the hills and trees.

The painting features a winding path or road that meanders through the hills, leading the viewer's eye into the distance, enhancing the depth of the landscape. The sky is rendered in a simpler, more subdued manner compared to the land, allowing the hills to be the main focus of the viewer's attention.

Masson's use of color and form conveys the natural beauty of the rural landscape, and the technique provides a textural quality that almost invites the viewer to feel the contours of the land. The reflection in the water at the bottom of the painting adds a tranquil element to the scene, suggesting a hidden body of water that mirrors the vibrancy of the surrounding land.