Hypha, a fungus filament composed of a chain of several cells; plural—hyphae; adjective—hyphal.

Inverse, (of the gill-trama in transverse longitudinal section), with the hyphae curving upwards and outwards on both sides of a central zone. See [Fig. 9B], [p. 17].

Irregular (of the gill-trama in transverse longitudinal section), lacking any clear pattern as to hyphal arrangement. See [Fig. 9D], [p. 17].

Mealy, covered in powdery granules, resembling meal.

Mycelium, a mass of fungus-filaments (hyphae).

Mycorrhiza, a symbiotic association of a fungus and the roots of a higher plant.

Non-amyloid (of the spore-wall, spore-ornamentation and hyphal walls), remaining uncoloured or becoming yellowish in solutions containing iodine.

OCHRACEOUS, bright clay-colour: colour of ochre (yellow-brown).

OLIVACEOUS BROWN, a dull clay-brown with an additional but distinct hint of dirty green.

Plano-convex (of the cap), regularly rounded although almost flat. See [Plate 13], [p. 67]—adult fruit-body.