Today's Chrysanthemums are highly evolved flowering plants. A member of the Asteraceae (Compositae), or Daisy family, the Chrysanthemum is also related to dahlias, sunflowers, marigolds, zinnias, and cosmos.
The bloom which appears as a single flower is actually hundreds of flowers called florets. Two kinds of florets are present in a single bloom: Ray florets are similar to the petals on a daisy, while disk florets tend to be the "flowers" in the center portion. The National Chrysanthemum Society classifies bloom forms into 13 classifications.