4. The primordium of the hymenophore is differentiated around the apex of the stem fundament as an annular internal zone of new growth. Frequently, before the hymenophore appears, a slight divergence ...

5. Perpendicular downward growth of hyphae from the under surface of the pileus, beginning in the angle between stem and pileus, forms the primordium of the hymenophore as an annular zone of new ...