In the next class, the stamens are united by their anthers.
XIX. Syngenesia: five stamens united by the anthers; as in the dandelion and violet.
In the twentieth, the pistil and stamen are united.
XX. Gynandria: stamens united to the pistil; as in orchis.
The plants of all the above classes have flowers furnished with both stamens and pistils; but in the next three the flowers are unisexual.
XXI. Monœcia: Flowers bearing stamens only, and flowers bearing pistils only, occurring on the same plant; as in the oak.
XXII. Diœcia: stameniferous flowers on one, and pistilliferous flowers on another individual of the same species; as in willows.
XXIII. Polygamia: Flowers bearing stamens and pistils, flowers bearing stamens only, and flowers bearing pistils only, all on the same individual, or on different individuals of the same species; as in the ash and pellitory.
The above classes contain all the plants that are Phœnogamous, or have distinctly perceptible organs of reproduction; the next and last class is composed of the cryptogamous, or those of which the flowers either do not exist, or have not been demonstrated.
XXIV. Cryptogamia: Ferns, mosses, lichens, sea-weeds, mushrooms, &c.