Blossoms are mostly simple and whitish, with the exception of the pomegranate tree and some varieties of almond trees. Some flowers are even sterile. Trees and plants in general grow out of seeds, out of roots, runners, branches, sprigs and some even out of the trunk, if it is sawn into discs. The ability to germinate decreases with the age of the seeds. In general it is gone within their fourth year, though peas and beans keep it longer.
Insects support the ripening of fruits and habitat and climate have an impact on plant growth.
Cultured plants are often infested with diseases, while this hardly ever occurs to wild plants. This depiction is followed by a systematology of plants. Wooden plants 2. Wild plants 4. Foreign trees and shrubs, their lifespan and diseases 5.