Where does “pejiguera” come from?

pejiguera (Spanish) comes from Latin persicaria, from Latin Persicus, from Ancient Greek περσικός, from Ancient Greek Πέρσης, from Old Persian 𐎱𐎠𐎼𐎿, from Proto-Iranian párcuš, from Proto-Indo-Iranian párćuš, from Proto-Indo-European pérḱus — chest; rib.

pejiguera (Spanish): lady's thumb