Apical mortality
Either the apical bud or the distal part of the main stem may die.
This phenomenon may appear during the season of growth, at the end of the season of growth or before the spring budbreak.
In young tree, one and rarely two relay axes take place in the prolongation of the main stem allowing it to keep a rectilinear aspects.
(Apical mortality at the time of budbreack, Cedrus atlantica  .
Apical mortality during the growing season, C. atlantica .
Apical mortality at the time of budbreak C. libani from Turkey
or C. brevifolia )
Lateral shoot growth
In some cases, subapical lateral bud may give rise a lateral shoot during the second or third flush of growth
.
This phenomenon may involve a more important development of branches
or more rarely the fork formation at the top of the main stem .
In this last case, the fork will rapidly disappear during the following years.
(form defects due to the development of a subapical branch of the annuals shoots, the same year of their extension on young individuals of C. libani
)
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