Aerogel

Plot twist: flower is Made out of steel...

i thought that was a burnt marshmallow

That's not aerogel. Areogel is opaque, almost clear. That is I believe graphene. But the fact is still true, just wrong picture.

Before reading the caption, I thought this would explain why that beautiful pink flower is so super strong.

That is actually a carbon aerogel, probably graphene or fullerene based.