Getting these firefly things

[mmmmmmmmmmmmmmmmm]

I'm in the Hallowed Marshes attempting to join the Holy Order. I'm helping this one guy get the ingredient he needs (the one whose name starts with an M, Morat or something), and he told me that I need to gather fireflies and bring them to some red flower or something. I got the fireflies, now what am I looking for?

[Cheungy]

large glowy red flower in marsh