Where does “Lercherlschas” come from?

Lercherlschas (German) comes from German lē̆rche, from Middle High German lē̆rche, from Old High German lerihha, from Latin larix, from Ancient Greek λάριξ, from Proto-Celtic daru, from Proto-Indo-European dóru, from Proto-Indo-European drew- — hard, firm, strong, solid; hard, fast; tree.

Lercherlschas (German): a fact or occurrence of no importance, a trifle