The Three Keys of the Tree of the Strong Bolster

There's a birth story about that tree, and it's that magical being called Shre Ollingtsh Euchar. He came to Ireland from where the sun sets in the far far west. And all of the communities are petrified because this trailing trail or ochre is a giant. The idea among pre-modern societies is hospitality. If anybody turns up you need to look after them for at least three days. So basically it's the origin story of the coming of the woodlands to Ireland.