A couple of current topics on this forum put me in mind of a technological application for Ash saplings which I decided to revisit.
Bearing my trusted celt I resorted to a rising and dense Ash grove along a river and culled a long and slender sapling. I've watched this once open place gradually become overtaken by these aggressive colonizers so I knew their rings would be fairly close-set from their many years of vertical striving among strong competition.
Next I sectioned out a preform for the project -
Placing the thicker end upon a stone anvil I beat it with a wood billet, trimming off the split bark with a chert knife -
And here we grasp the rationale behind the Latin name given to the Ash, Fraxinus - it fractures. And it's reputation for resiliency, toughness and flexibility make it appropriate for a long-lived, stiff and hard-working hand broom or fiber brush:
Held in hand for scale -
End view to show the measure of splitting -
...which may be increased for a finer grade of working splinters according to the investment of pounding. But for this I would transition to a softer anvil such as wood, to do more splitting than nipping.