Nothing says summer like sunflowers. These sun worshipers’ cheerful, round, daisy-like faces rotate to follow the sun all day. When darkness falls, they turn again to face east, awaiting the morning sun. This movement is called heliotropism. As the heads become top-heavy with seeds, the heads bow, and this daily movement ceases.Interestingly, a sunflower is not really “a” flower; instead, it is the pseudanthium (flowerhead), created from many tiny flowers destined to become a seed. Outer petals are ray flowers, …
