Create an image of a classic sunflower standing tall amidst a rustic countryside field during late summer. The sunflower should have large golden-yellow petals with a rich, brown center, facing the viewer as it basks in the sunlight. The field should be filled with other sunflowers extending towards the horizon, interspersed with patches of green grass and an old wooden fence. The background includes a clear azure sky with a few fluffy white clouds. Use an impressionist painting style to capture the vibrant colors and textures, with bold brushstrokes that convey the warmth and serenity of the scene. The angle should be a frontal view at eye level, emphasizing the sunflower's commanding presence.