くまわらびじゃなかったです
熊蕨じゃなかったです
kumawarabijanakattadesu

Noun
Desu Copula

The polite, past negative form of くまわらび

1. Was not a bear fern.; Wasn't a bear fern.

Past/Perfective
Negative
Polite
Casual Register
Usually Written in Kana