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The hymenophore is not separate from the trama of the gills.

Where the stem is present it is either an interrupted continuation of the hymenophore or fleshy substance of the cap, or else is supported separately as a pillar on which the cap rests, a more or less distinct line of demarcation showing where the fibers terminate.

Mushroom gills, or lamell�, anatomically considered, are composed, first, of a central portion, a prolongation of the hymenophore or flesh of the cap, more or less dense, sometimes so thin as to be scarcely perceptible; second, the hymenium or spore-bearing membrane covering the surfaces of this prolonged hymenophore.

Hymenophore distinct from the stem.

Hymenophore fleshy, hymenium inferior, that is, on the under surface of the cap, at first papillose; the papill� at length elongated, and forming distinct tubes.