And the Kohen shall take cedar wood and hyssop and crimson wool, and cast them into the midst of the burning of the heifer.
Torah Temimah: Chullin 62b — “Ezov” — and not Greek ezov, and not kohali ezov, and not Roman ezov, and not desert ezov, and not any ezov that has an accompanying name.
English: “Ezov” — and not Greek ezov, and not kohali ezov, and not Roman ezov, and not desert ezov, and not any ezov that has an accompanying name.
Exclusion of all named or qualified varieties of the plant.
Only the ordinary, unnamed species of hyssop is valid for the para aduma; any variety that carries a special name is disqualified.