Flowers bloom for just one reason—so that the plant can reproduce. Some flowers bear male and female reproductive organs. The male parts, called stamens, are long filaments; each holds a pollen sac at its tip. The female part, called the pistil, is in the very center of a flower. An ovary at the base of the pistil holds one or more ovules, and the tip of the pistil is specialized to receive pollen. If pollinated, an ovule—protected inside its ovary—grows into a seed.
ALONE OR TOGETHER
Some flowers, such as roses and tulips, are solitary—a single flower grows on a stem. Others, such as wooly blue curls, grow in a cluster called an inflorescence. The individual flowers of an inflorescence are sometimes called florets. You might think a calla lily or a daisy blossom is a single flower, but these are actually inflorescences with many tiny florets.