Acacia dealbata Link. Auckland: Oratia, August 1948, D.W. McKenzie; Campbell's Bay, August 1950, E.E. Chamberlain. Leptospermum ericoides A. Rich. Auckland: Huia, 100ft, November 1945, G.H.C., October 1953, J.M. Dingley; Manaia, Whangarei Heads, October 1947, J.M. Dingley; Rereatukahia Reserve, Katikati, 500ft, September 1950, G.H.C.; Great King Island, Three Kings, January 1952, E.E. Chamberlain, December 1955, P.J. Brook; White's Stream, Piha, January 1954, J.M. Dingley. Leptospermum scoparium Forst. Auckland: Whakarewarewa, 1,200ft, October 1945, G.H.C.; Cascade Kauri Park, Waitakeres, 700ft, October 1945, J.M. Dingley; Wood's Bay, Titirangi, March 1946, J.M. Dingley; Mt. Te Aroha, 950ft, November 1946, G.H.C.; Mt. Albert, September 1948, D.W. McKenzie; Little Huia, 200ft, February 1949, Mrs. E.E. Chamberlain; Swanson, April 1949, P.M. Ambler; Walker's Bush, Waitakeres, August 1950, J.M. Dingley; Oratia, Waitakeres, 900ft, July 1951, J.M. Dingley; Cornwallis, 100ft, May 1952, J.D. Atkinson; Moturoa Island, Bay of Islands, 100ft, May 1956, J.D. Atkinson; Mt. Te Aroha, 1,100ft, October 1956, G.H.C., type collection, P.D.D. herbarium, No. 16644. Leucopogon fasciculatus (Forst. f.) A. Rich. Auckland: Hunua Falls, 400ft, October 1946, G.H.C. Phyllocladus trichomanoides Don. Auckland: Kauri Park, Birkenhead, July 1946, J.M. Dingley. Pinus radiata Don. Auckland: Woodhill, 100ft, July 1953, J.M. Dingley. Pittosporum tenuifolium Banks & Sol. Auckland: Konini Road, Waitakeres, 900ft, July 1947, J.M. Dingley. Weinmannia racemosa L. f. Auckland: Mt. Te Aroha, 1,100ft, October 1956, G.H.C.

Hymenophore pileate or resupinate, annual, sometimes reviving a second season, coriaceous, developing at first as numerous orbicular sessile-umbonate colonies 5-10 mm diameter; merging to form either broadly resupinate linear areas with reflexed margins, or remaining resupinate, to 20 x 5 cm. Pilei narrowly effused-reflexed, to 5 cm wide, extending the length of the upper margin of the fructifications, or sometimes imbricate; surface chestnut or more usually umber or sepia, tomentose or strigose; hymenial surface at first radially sulcate, fuscus, umber, or sepia, sometimes radiately rugose, at length tardily creviced, sometimes in radiate series, when fertile becoming cinereous; margin thinning out, fibrillose, crenate, at first broad and white or tan, becoming fawn, finally concolorous, free. Context sepia, shining in section, 0.3-0.6 mm thick, intermediate layer of mainly parallel hyphae turning abruptly into the hymenium; hyphal system monomitic; generative hyphae to 6 µ diameter, walls 0.2-0.5 µ thick, yellow brown, darker when old and towards the base, branched, septate, without clamp connexions. Hymenial layer a close palisade of basidia, paraphyses and scanty projecting pseudosetae; in sterile plants composed of pseudosetae arranged in a loose palisade. Basidia subclavate, 24-30 x 5-6.5 µ, 4-spored; sterigmata erect, slender, to 6 µ long. Paraphyses subclavate, shorter and narrower than the basidia. Pseudosetae subclavate or cylindrical, some with slightly inflated apices, walls usually naked, yellow brown, 0.25 µ thick. Spores elliptical with lateral apiculi, or suballantoid, 6-7 x 3.5-4.5 µ, walls smooth, hyaline, 0.1 µ thick.

DISTRIBUTION: New Zealand.

HABITAT: On bark of dead standing stems and trunks.

Hymenophorum pileatum vel resupinatum; pileis effuso-reflexis, superficie castanea vel sepiacea, tomentosa; resupinatum orbiculatum liberis marginibus; superficies hymenii umbrina vel sepiacea, ubi fertilis cinerea, tarde rimosa. Contextus sepiaceus, hyphis fere parallelis in hymenio recurvatis; hypharum systema monomiticum; hyphae generatoriae ad 6 µ diam., parietibus 0.2-0.5 µ crassis, brunneis, enodulosis. Pseudosetae cylindricales leviter inflatis apicibus, parietibus brunneis, nudae. Basidia subclavata, 24-30 x 5-6.5 µ, 4 sporis in tenuibus sterigmatibus. Sporae ellipticae vel suballantoides, 6-7 x 3.5-4.5 µ.

Separated from D. fulva, which it resembles most closely in macrofeatures, by the monomitic hyphal system, usually naked pseudosetae, differently coloured freely septate generative hyphae, and differently shaped spores. The hymenial surface is at first sepia or chocolate in colour because of the copious development of pseudosetae. When plants become fertile the colour changes to cinereous. The hymenium is tardily developed, at first appearing as scattered groups of basidia and paraphyses lying among the pseudosetae; later, basidia and paraphyses form a close palisade submerging the pseudosetae which then appear as a dense zone in the subhymenium with a few projecting. Hyphae are somewhat scantily branched; branches arise beneath septa, grow out at a wide angle, then turn parallel with the parent hypha. The effused-reflexed pilei develop only upon the upper margins of fructifications growing upon upright stems. They are uncommon, since most plants are either resupinate or umbonate-sessile with free plane margins. Plants possess a disagreeable odour, even after long keeping in the herbarium.