Plant architectural analysis is introduced step by step from the lowest morphological levels up to the architectural unit concept, illustrated on a specific example.

• Preliminary architectural concepts are introduced first.


• The different levels of plant structure organization are then presented (phytomer, growth unit, branched system, architectural unit, and whole plant).


• Axis typology is introduced from morphological and geometrical traits, whose combinations define architectural models.


• Instancing axis typology traits to a specific plant species defines the Architectural Unit.


• Lastly, definition of the Architectural Unit is illustrated on a specific plant (wild cherry tree).