Production of thick white mycelial mats, production of rhizomorphs (shoe string like structures) in culture and sometimes on the roots. During the sexual phase mushrooms are formed with caps up to 51 mm (average 35 mm) diam, convex later broadly plane, center broadly umbonate sometimes depressed encircling zone, citrine in the center, becomes orange yellow to shades of light cream at margin, brussels brown squamules are present on the cap, margin of cap incurved, striate. Lamellae: white, decurrent, close. Stipe: 64-87 mm X 2-4.5 mm, central, cylindrical, solid, olive gray becomes lighter towards the ring, buff coloured just above the ring, becomes citrine towards the apex, pale olive gray flocci are present from base to ring, brownish white inner tissue. Ring: close to apex, membranous saccate, circumscissile, whitish.