Fruitbodies two. Pilei 0.8 - 3.0 x 0.3 - 0.5 cm, vinaceous brown to yellow-brown, glabrous, appears to have been viscid when fresh. Stipe 1.8 - 3 x 0.3 - 0.6 cm, obclavate, khaki overall, faintly reticulate at the apex only. Pileus cuticle an interwoven ixotrichodermium; terminal cells 4 - 6.5 µm diam. (d^m = 4 µm), equal to subclavate, hyaline in KOH, yellow in Melzer's. Tube trama hyphae 4 - 9 µm diam. (d^m = 6.5 µm), hyaline in KOH, yellow in IKI. Clamp connections absent. Basidia 23.5 - 36.5 x 9 - 13 µm (D^m = 28.5 x 10.5 µm), thin-walled, clavate, 2 - 4 sterigmate, hyaline.in KOH, yellow in Melzer's. Pleurocystidia 43 - 58.5 x 8 - 9 µm (D^m = 56 x 9 µm), narrowly fusoid-ventri cose, hyaline in KOH, yellow in Melzer's (Fig. 16); cheilocystidia 24.5 - 54.5 x 6.5 - 10.5 µm (D^m = 41.5 x 8 µm), equal to subclavate, hyaline to pale yellow-tan in KOH, yellow in Melzer's, with an occasional distal secondary septum, abundant and clustered around the pores (Fig. 17); caulocystidia 39 - 69 x 6.5 - 9 µm (D^m = 52 x 8 µm), equal to clavate, scattered, pale yellow in KOH, gold-brown to dingy brown in Melzer's. Spores 14.5 - 19.5 x 4 - 5 (-6.5) µm (D^m = 17 x 5 um; E = 2.4 - 4.6; E^m = 3.5), elliptical to fusiform, inequilateral by a broad shallow suprahilar depression and adaxial swelling, yellow green with cinnamon walls in KOH, rust-yellow in Melzer's (Fig. 18); surface smooth, with a small and obscure inner wall discontinuity, surrounded by a hyaline membrane; in deposit "Russet", light brown.

Observations. Wolfe & Petersen (1978) published SEM's of the spores of this specimen which show the spore surface as smooth. Furthermore, the hymenophore at maturity is pallid flesh color. Because this specimen is the type specimen of the type species of the genus Mucilopilus, the following new combination is proposed.
Mucilopilus viscidus (McNabb) Wolfe, comb. nov.
Basionym: Porphyrellus viscidus McNabb. 1967. New Zealand J. Bot. 5(4): 543.

Type specimen (holotype): PDD - "25185; scattered under Leptospermum scoparium/ericoides; Auckland, Kerikeri, Opito Bay; 16.v.1966; R.F.R. McNabb." [!]