The hypoderm is a distinct layer of the pileipellis, below the surface layer. The trama is the flesh of the pileus, below the surface layer or layers that make up the pileipellis.

Gelatinised hyphae are best observed in a weak KOH solution with Congo Red, which stains the hyphae and provides contrast against any intervening gel.

Choose this state if: the hyphae of the hypoderm or the pileus trama are not gelatinised (although the hyphae of the outer layer of the pileipellis may be gelatinised).