Teazel

I let them seed around the garden after introducing them several years ago. The insects, particularly hoverflies, love the flowers, and some birds like the seeds. If you look closely, you can just see that there's something inside a section in the middle towards the bottom. I wasn't wearing my specs when I took the photo, but I probably need the magnifying glass to take a closer look. I've noticed this sort of thing before. It looks like a mollusc or grub curled up inside.