まむしぐさじゃありませんでした
蝮草じゃありませんでした
mamushigusajārimasendeshita

Noun
Desu Copula

The polite, past negative form of まむしぐさ

1. Was not a vipergrass.; Was not a snakegrass.

Past/Perfective
Negative
Polite
Terminal Form
Usually Written in Kana