A compact cluster of ± sessile flowers; the capitulum may be surrounded by specialised bracts, the involucre.
A short head.
A compact cluster of more or less sessile flowers.
A dense head of tiny flowers without individual stalks (as in the Daisy and Teasel families), surrounded by an involucre of bracts.
The rounded end of a bone which articulates with another bone, e.g. the distal end of the humerus.