Tulip muffin papers are definitely not your standard cupcake wrappers. They have long “petals” that rise up over the rim of the baking pan and around the muffin, giving a regular muffin a decidedly different look. The wrappers are made out of a larger square of paper (usual parchment or similar paper) that has been folded up to form a cup shape. These days, tulip papers can make a muffin or a cupcake look quite fancy, but before muffin papers were sold en-masse in a standard shape, they were more common. They were relatively easy to make and probably made it easier to transport baked goods – especially delicate ones – compared to unwrapped muffins/cakes baked straight in a baking pan.
These papers can be difficult to find in stores. The only retailers that might stock them are specialty baking stores, and even they might not carry them since regular muffin papers get the job done just as easily and are usually less expensive. If you want them, you’ll probably have to order them online and have them shipped out to you.