>Pileus 4-8 cm. latus, 2-3 cm. longus, sessilis, postice decurrens interdum omnino resupinatus, umbrinus, concentrice sulcatus et paucis zonis obscurioribus ornatus, adpresse spongioso-tomentosus. Trama tenuis, rigida, umbrina. Hymenima nigrum, pruina albida velatum, ut caesio-glaucum videtur. Cystidia nulla; basidia hyalina; sporae non visae. Hyphae subhymeniales brunneae, tenuiter tunicatae, flaccidae, septatae, saepe ad septa nodosae, 3-5 µ crassae.

A beautiful species, of striking appearance on account of the pruinose hymenium, which appears bluish-grey in colour and contrasts sharply with the umber-brown pileus. The bloom on the hymenium appears to be due to a deposit of a waxy nature, which dissolves on the addition of potassium hydrate solution. The appearance of the upper surface of the pileus resembles that of S. proliscans Berk. (= S. vespilloneum Berk.); but the hymenium differs in colour, having no tint of brown, and in the absence of cystidia. The dark-brown basal hyphae, with clamp connections, are also distinctive.

Hab. On decaying wood, Rotorua, New Zealand.