筑紫 ちくし石楠花 しゃくなげであれば
chikushishakunagedeareba

Noun
Da Copula

The "-eba" conditional form ("if/when…") of 筑紫石楠花

1. If it were Tsukushishi Nanohana; If Tsukushishi Nanohana were the case

Ba Conditional