XIII. Semiflosculosæ, with flowers composed of small irregular corollas, of an elongated flat shape; as the dandelion.
XIV. Radiatæ, with flowers composed of funnel-shaped florets at the centre, and flat ones at the circumference; as the daisy.
* * * Destitute of flowers.
XV. Apetalæ, whose flowers have no true corolla; as the grasses.
XVI. Apetalæ, entirely destitute of flowers, but having leaves; as the ferns.
XVII. Apetalæ, without apparent flowers or fruit; as mosses.
Division II. Trees.
Without petals.
XVIII. Apetalous Trees or Shrubs, having their flowers destitute of corolla; as the box.
XIX. Amentaceæ, with the flowers disposed in catkins; as the oak.