Page:An introduction to physiological and systematical botany (1st edition).djvu/429

 Rh The Orders of the great natural 19th Class, Syngenesia, are marked by the united or separated, barren, fertile, or abortive, nature of the florets.

1. . Florets all perfect or united, that is, each furnished with perfect Stamens, a Pistil, and one Seed.

2. . Florets of the disk with Stamens and Pistil; those of the radius with Pistil only, but each, of both kinds, forming perfect Seed.

3. . Florets of the disk as in the last; those of the radius with merely an abortive Pistil, or with not even the rudiments of any. This is a bad Order, for reasons hereafter to be explained.

4. . Florets of the disk with Stamens only, those of the radius with Pistils only.

5. . Several flowers, either simple or compound, but with united anthers, and with a proper calyx, included in one common calyx.