Histoire des Champignons de la France, Vol 2

A botanical engraving depicts four figures of a mushroom labeled 'Boletus'. Figure A shows the mushroom from above, Figure B shows the pore surface from below, Figure C shows a vertical cross-section, Figure D shows a partial cross-section, and Figure M provides a magnified detail of the pores.

12. THE YELLOW BOLETUS, THE THICK BOLETUS. chrysenteron

Boletus luteus? [Yellow/Slippery]. L.S.P. Crypt. Fung. 1646. HABIT; it rarely exceeds 3 inches in height, and is found in woods, in the shade, during summer and autumn. CAP fairly regularly rounded, convex, sometimes slightly flattened, or even somewhat hollow; its substance is firm and thick; it changes color as soon as it is cut; it is lined with yellowish pores shaped like a sponge: those surrounding the stalk at its insertion are elongated and cannot be separated in their entirety. STALK filled with a firm substance in its youth, but which becomes spongy as it ages.

N 3 The flesh of the cap and the stalk is almost always riddled with worm holes. Fig. A represents a YELLOW BOLETUS seen from above. Fig. B is the same BOLETUS seen from below. Figs. CD are pieces of this plant cut vertically. Fig. M represents pipes or pores drawn under a magnifying glass.

It has a mushroom odor, slightly sulfurous, and is mucilaginous and almost tasteless. It is not common practice to eat it, although it does not appear to contain anything poisonous.