Verse Lv23-40d discussing the requirement to
have a Lulav and Ethrog on Succoth states
Take for yourself on the first day ...palm branches...and thick branches....
Rashi explains that thick branches refer to mrytle branches
because the leaves are arranged in sets of three overlapping sets like
the overlapping threads that make twine thick.
Rashi here explains meaning by form. We have frequently
referred to the triple FFF method of naming items by
Form/appearance - white house, pentagon, orange dress,
Function/purpose - United Nations, screw-driver,
Feel - e.g. hardship.
Here Rashi names the mrytle branch by its thick appearance.
But to properly understand this Rashi we must use the Non-Verse-geometric
method: The reason the mrytle branch appears thick is because its leaves
overlap like the overlapping threads that are used to make thick twine.
Thus the proper understanding of this Rashi requires both the meaning
and spreadsheet methods.