Polyporus (Fungus): no gills, but 'pores'.Species?

Polyporus (Fungus): no gills, but 'pores'.Species?

Observation - Polyporus (Fungus): no gills, but 'pores'.Species?. Description: Cap about 35mm across, stem length ~10mm. Smooth with dip where stem meets cap.Pores whitish to very pale orange. Growing on dead birch branch on ground.

Cap about 35mm across, stem length ~10mm. Smooth with dip where stem meets cap.Pores whitish to very pale orange. Growing on dead birch branch on ground.