The names of the plants ought to be stable [certa], consequently they should be given to stable genera.

There is no generation from an egg in the Mineral Kingdom. Hence no vascular circulation of the humours as in the remaining Natural Kingdoms.

In natural science the principles of truth ought to be confirmed by observation.

Blessed be the Lord for the beauty of summer and spring, for the air, the water, the verdure, and the song of birds.

We admit as many genera as there are different groups of natural species of which the fructification has the same structure.

If you do not know the names of things, the knowledge of them is lost, too.

If a tree dies, plant another in its place.