Gribbroek, Robert (American, 1906-1971) American artists

The picture has something of this: nature, flower, flora, summer, beautiful, leaf, garden, season, bright, blooming, floral, growth, petal, closeup, tropical, vibrant, tree.
Perhaps it’s a painting of a large red flower in the middle of a green, blue, yellow, and red sky with mountains in the distance in the background.