How do you save in the Persona games

I'm currently playing Revelations Persona for PS1 but am scared to play too far into it because there doesn't appear to be an obvious way to save the game.Anyone know how? How do you save in the Persona games
If there's a large Pink Tree (Augustus tree) in a room, that's the save point.How do you save in the Persona games
The pink founa is the save place