In Paul Friedrich's book Proto-Indo-European Trees he identifies the "semantic primitives" of the Indo-European tribe of languages through a group of words that have not changed much through twelve thousand years - and those are tree names: especially birch, willow, adler, elm, ash, apple and beech (bher, wyt, alysos, ulmo, os, abul, bhago). Seed syllables, bija, of the life of the west.
Gary SnyderYou run into people who want to write poetry who don't want to read anything in the tradition. That's like wanting to be a builder but not finding out what different kinds of wood you use.
Gary Snyder