ABSTRACT
What is a plant? Flowering plants are by far the most important plants and this book is primarily a study of them. The most fundamental dividing line between living organisms is that between prokaryote and eukaryote cells. Within the eukaryotes there are three main multicellular kingdoms, plants, animals and fungi and a heterogeneous group, the protists, belonging to several equivalent kingdoms. We include here only plants and some plant-like protists for comparison.
