Parashas Metzora · Passuk 14:04
Chabad.org — English translation + Rashi
Torah Temima points to Negaim 14:6 / Toras Kohanim.
English: “And hyssop” — hyssop, but not Greek hyssop, nor kochalis hyssop, nor Roman hyssop, nor desert hyssop, nor any hyssop that has a qualifying adjective.
Mi’ut from unqualified “ezov”
Chazal limit the hyssop to the ordinary species that has no secondary designation.