Photograph of a cluster of Norway maple flowers attached to a small branch with out of focus flowers, branches, and blue sky in the background. Norway maples produce small flowers approximately 1/3rd inches across that are essentially monochromatic with five lime-green petals and five lime-green sepals that radiate from a center with a large lime-green pistil with a lime-green stigma and about 8 lime-green stamens with lime green anthers.