unfolding spears

The 'spear'-like buds of the beechtree are slowly, or shall I say, rapidly unfolding.
Now as it is getting warmer, suddenly the beechbow in my garden is transforming into sap-greens.
Its always a delight to see the leaves unfolding like a fan, only opening, if you try it to fold them back, which I sometimes try, they don't not want to.