On dead (1) Coprosma australis, Auckland, Waitakere Ranges, Cutty Grass Track, 3.IX.l965, R. F. R. McNabb, 24708. (2) Quercus robur, Auckland Domain, 4.I.l966, R. F. R. McN. (HOLOTYPE, PDD 24930); 9.I.l967, R. F. R. McN., 25606. (3) Weinmannia racemosa, Stewart Island, 17.II.1954, J. M. Dingley, 25605.

Fructifications soft to waxy-gelatinous, resupinate, thin, effused, indeterminate, forming irregular areas to 10 cm in longest dimension, greyish-hyaline to bluish-grey when fresh, surface pruinose to farinaceous, drying to a hyaline to greyish-white film; margins concolorous, adnate. In section 50-100 µm thick, composed of basal layer and hymenium. Basal layer thin, indistinct, composed of thin-walled, hyaline, agglutinated hyphae lying parallel with substratum, clamp connections present. Fertile hyphae hyaline, thin-walled, tortuous, 2-4.5 µm diam., clamped. Hymenium composed of dikaryophyses, paraphysoids and basidia; dikaryophyses abundant, arising from basal hyphae or base of fertile hyphae, projecting 10-30 µm beyond basidia, nodulose, clamped, finely and irregularly branched apically; paraphysoids sparse to abundant, arising from base of fertile hyphae, variable in shape but typically irregularly cylindrical to subclavate, hyaline, thin-walled, devoid of coloured contents, 25-80 x 5-10 µm; probasidia initially cylindrical to clavate, later broadly obovate to pyriform, proliferating through or near basal clamp connections, 14.3-19.2 x 10-13.4 µm, becoming longitudinally cruciate-septate; sterigmata cylindrical, to 45 x 3-4 µm. Basidiospores cylindrical, curved-cylindrical, or ovate and flattened on one side, hyaline, aguttulate, apiculate, 10.4-15.6-(17.3) x 4.8-6.5-(7.2) µm. Germination by repetition, or by stout germ tubes.

Dead angiosperm wood.

Fructificationes molliter gelatinosae ad ceraceo-gelatinosas, resupinatae, tenues, pruinosae ad farinaceas, griseo-hyalinae ad caesias; ordo basalis tenuis, factus ex hyphis indistinctis, nodosis. Dikaryophyses subtiliter et irregulariter ramosae ad apicem; paraphysoidea irregulariter cylindrica ad subclavata, 25-80 x 5-10 µm; probasidia late obovata ad pyriformia, 14.3-19.2 x 10-13.4µm, per longitudinem cruciata-septata; sterigmata cylindrica, ad 45 x 3-4 µm. Basidiosporae cylindricae, curvo-cylindricae vel ovatae, 10.4-15.6-(17.3) x 4.8-6.5-(7.2) µm. Germinantes per repetitionem, vel per tubulos. Habitat in mortua Querco robore.

The absence of both thick-walled cystidia and gloeocystidia with coloured contents indicate that this species belongs in sect. Sebacina. It closely resembles S. umbrina. Rogers but spores of S. novae-zelandiae are considerably broader and range in shape from curved-cylindrical to ovate and flattened on one side.

Typus Auckland Province, Auckland Domain, 411966, R. F. R. McNabb, PDD 24930.