Complex sentence: Like other boletes, it has pores instead of gills that make up the hymenophore on the underside of the cap; these are relatively large, irregular, grey-to olive-yellow and generally decurrent.
Split into simpler sentences: Like other boletes, it has pores instead of gills that make up the hymenophore on the underside of the cap. The pores are grey-to olive-yellow and generally decurrent.