This paper discusses the use of Plant Functional Types to describe vegetati
on types - from plant communities to formations - in order to understand th
e ecological constraints of plants and plant communities on a higher level
of abstraction. The terminology around plant functional types, traits and s
trategies is in need of further clarification and unification. The use of t
he term plant functional type is recommended. We are in need of a total env
ironmental framework in which, hierarchically or reticulately, plant functi
onal types can be compared and interpreted.