AChrysanthemum done in buttercream.
Chrysanthamums are normally done with decorator tip 81.
AThe ref one looks different though
I agree w/K8 those are carnations.
I really can not tell what kind of flowers they are. If they are carnations, here is one video using rose petal tip doing carnations.
It looks like the red ones are made with tip 79-80-81 and the pink ones with tip 101 or 102.