Tulip with yellow flowers and striped red patterns

I came home with some more vegetables from the farm shop and unloaded my bags on the table. Out of the corner of my eye I saw a big bumble bee flitting between the flowers just outside the sliding doors, so I picked up my camera which was on the table.

I saw the bee go inside the heart of this tulip, but by the time I could get nearby it had buzzed away. I could resist having a look at what it was attracted to.