capitulum

But just how do the knobs—called capitula—attract ants?

Jerome, in fact, seems to have been the first to unambiguously use the term capitulum to refer to a numbered, titled segment of a text.

On the attachments of the Urodele rib to the vertebra and their homologies with the capitulum and tuberculum of the Amniote rib.

Disc, or Disk, the central part of the capitulum of composit�, surrounded by the ray.

The sterile bracts of the daisy occasionally produce capitula, and give rise to the hen-and-chickens daisy.