2. Raceme.—Flowers stalked along a common axis.
3. Corymb.—Flowers stalked along a common axis, but the lengths of the pedicels varying in such a manner as to bring all the flowers to the same level.
4. Umbel.—The pedicels all start from the same level on the peduncle.
5. Cyme.—An arrangement in which the flower directly at the end of the peduncle opens first, followed by those on the branching pedicels.
6. Panicle.—A compound raceme—a raceme the pedicels of which are themselves branched.
7. Capitulum or Flower-head.—A dense cluster of flowers, all attached to a common broad disc or receptacle.
Other forms of inflorescence may also be compound. Thus, a compound umbel is produced when the pedicels of an umbel are themselves umbellate.
The Flower
A flower, if complete in all its parts, consists of modified leaves arranged in four distinct whorls, the parts being directly or indirectly attached to a receptacle.