The different growth patterns of the beech tree are described from a morphological and architectural point of view in the first part of this paper. In about 10 years, individuals can achieve various forms, according to the growth pattern. About thirty architectural variations are examined in the second part of this study; they reveal a surprising diversity within the species. In seedlings, the interindividual variations confer upon small beeches distinct "social status." In a regeneration, the silviculturist distinguishes individuals as well and poorly grown. This distinction into categories can henceforth rely on an architectural basis. Light and genetics have an important influence on the architecture of young beeches.