caulohymenium

— Lateral stipe stratum under the caulohymenium present and well differentiated from the stipe trama, of the “boletoid type”, at the stipe apex a 40–100 (160) μm thick layer consisting of divergent, inclined and running towards the external surface, loosely intermingled and sparingly branched hyphae remaining separate from each other and faintly to distinctly embedded in a gelatinous substance; the stratum reducing during development and finally disappearing at maturity.