Mystery Macro

To be honest, I would have no clue what these white things are. Are they part of a toothbrush, are it bristles? It would be a mystery for me.
Thanks to osuzanna for hosting the Tiny Tuesday challenge.

Spoiler: the extra shows another view of the same. It appears to be an Eupatorium cannabinum, or holy rope (in German Gewöhnliche Wasserdost; in Dutch Koninginnekruid). The blossoms are tiny, 2-3 millimetres. The "bristles" are really small.
Thanks to Miranda1008 for hosting the WildFlowerWeek challenge