こうやのまんねんであれば
高野の万年蘚であれば
kōyano mannendeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of こうやのまんねんごけ

1. If it is Takano's perennial moss…; If Takano's perennial moss were…

Ba Conditional
Usually Written in Kana