A metamer of PA 1 can bear a maximum of two lateral buds of PA 2 (i.
In that case, it produces a new metamer with lateral buds ([F.
The recursive equations for the moments of the numbers of metamers are finally deduced.
However, we can distinguish two types of metamers along the stem.
Metamers, in their various modifications, are organized into repeating units, and these determine the aspect and organization of the shoot system.
All of these concepts--module, submodule, and SGU--have a more serious deficiency: the repeating sequences of metamers may be different at different places on a shoot, or on different shoots, and the sequences themselves may be organized into sequences.
A definition that allows for comparison among all types of shoots must account for the different variables contributing to their growth: that growth is repetitive; that the repetitive patterns are often independent of external phenomena; that plants are constructed from metamers that may be dissimilar from other metamers on the same axis and from metamers on different axes or plants; and that metamers may be organized into sequences of different orders.
Any sequence of metamers within a RGU that does not include all possible sequences in that RGU is a subsequence (SS).