Some classifications and definitions of terms are based on special papers which are cited in the literature. A few new terms for perianth position, gynoecial and staminal types are introduced . Phytography, as an ordered and precise subject, is still in a rather primitive state. Seemingly there are too many terms in this chapter, but a real need exists for even more, with precise definition and application. Terms represent concepts, or states of concepts.
Generalized concepts provide the basis of classification.