Probably a Venus flytrap plus a drosera
The drosera was for the sapels on the undersideside of Plantera, like a VFT on top of a droseraVFT in the second phase, sure, a bunch of closed flowers in the first phase, yes... A drosera... not at all.
If you mean the pink tentacle-ish things in the "mouth", those look far more like filament without a visible anther from any number of plants. Actually, they look a bit like saffron stigma.
The drosera was for the sapels on the undersideside of Plantera, like a VFT on top of a drosera