Prunus persica (L.) Batsch.
Deu.: Pfirsich, Pfirsichbaum.
Bot. syn.: Amygdalus persica L., Persica vulgaris P. Mill.
Carrie writes me:
"I've always been taught that peach leaf tea was prepared in the South to soothe the soul of those who are grieving a loved one :) "
Thank you for that, Carrie!