"It converts sunlight into energy. In the darkness after sunset, it closes its petals and becomes still."
Sunflora in may ways is the perfect embodiment of a plant, especially in the way it interacts with the sun itself. If it doesn't get enough sunlight, it won't have energy to move, and this was shown many times in the anime. In fact, it literally acts like a flower through this by withering up when the sun isn't there.
Sunflora's Basic Attacks are Razor Leaf and Bullet Seed, while its Special Attacks are Petal Blizzard, Solar Beam and Sludge Bomb.