Aristotelia serrata (Forst. f.) Oliver. Wellington: Pohangina Reserve, 200ft, September, 1953, G.H.C. Beilschmiedia tawa (A. Cunn.) Hook. f. & Benth. Auckland: Lake Waikaraeiti Track, 2,800ft, September, 1950, G.H.C.; Earthquake Flat, Rotorua. 1,500ft, June, 1952, G.H.C. Brachyglottis repanda Forst. Auckland: Mt. Pihanga, 2,000ft, October, 1949, J.M. Dingley. Carpodetus serratus Forst. Auckland: Moumoukai Valley, Hunua Range, October, 1946, J.M. Dingley. Coprosma arborea Kirk. Auckland: Little Barrier Island, 200ft, November, 1947, J.M. Dingley. Coprosma areolata Cheesem. Auckland: Whangarei Heads, October, 1947, J.M. Dingley. Coprosma australis (A. Rich.) Robinson. Auckland: Mt. Hauhaugatahi, 2,800 feet, February, 1952, G.H.C.; Atkinson Park, Titirangi, 900ft, June, 1953, J.M. Dingley; Mountain Road, Henderson, 800ft, September, 1.953, J.M. Dingley. Wellington: Botanical Gardens, Kelburn, 200ft, January, 1927, G.H.C. Coprosma foetidissima Forst. Otago: Horse Shoe Bay, Stewart Island, February, 1954, J.M. Dingley. Coprosma robusta Raoul. Auckland: Moumoukai Valley, Hunua Range, October, 1946, J.M. Dingley; Mt. Te Aroha, 880ft; November, 1946 G.H.C.; Ketetahi Springs, Mt. Tongariro, 4,800ft, October, 1949, J.M. Dingley; Mt. Maunganui, coast, January, 1950, M. Hodgkins; Waiomo Valley, Thames, June. 1950, J.M. Dingley; Rangitoto Island, July, 1950, J.M. Dingley; Purewa Bush, August, 1950. D.W. McKenzie; Old Exhibition Drive, Titirangi, 800ft; October, 1950, J.M. Dingley; Kohekohe, February, 1952, J.M. Dingley; Campbell's Bay, July, 1953, J.M. Dingley; Te Kouru, Coromandel Peninsula, August, 1954, J.M. Dingley; Waiomo Valley, Thames, August, 1954, S.D. Baker. Wellington; Lake Papaetonga, 50ft, October, 1930; G.H.C., type collection, P.D.D. herbarium, No. 3719, Kahuterawa River, October, 1930. G.H.C. Fuchsia excorticata L.f. Westland: Weheka, 600ft, December, 1946, J.M. Dingley. Macropiper excelsum (Forst. f.) Miq. Auckland: Woods' Bay, Titirangi, July, 1948, J.M. Dingley. Melicytus ramiflorus Forst. Auckland: Little Barrier Island, November, 1947, J.M. Dingley. Nothopanax arboreum (Forst. f.) Seem. Auckland: Wairongomai Valley, Te Aroha, October, 1948, J.M. Dingley. Nothopanax colensoi (Hook. f.) Seem. Auckland: Mt. Pihanga, 2,000ft, October, 1949, J.M. Dingley. Olearia furfuracea (A. Rich.) Hook. f. Auckland: Mt. Te Aroha, 800ft, November, 1946, G.H.C.; Mt. Maunganui, 300ft, December, 1949, M. Hodgkins. Oxylobium callistachys Benth. Auckland: Campbell's Bay, November, 1946, Mrs. E.E. Chamberlain. Pittosporum colensoi Hook. f. Otago: Garden Mound, Stewart Island, February, 1954, J.M. Dingley. Pseudopanax crassifolium (Sol.) Koch. Auckland: Mt. Tongariro, 2,500ft, December, 1930, G.H.C. Rhopalostylis sapida (Sol.) Wendl. & Drude. Auckland: Swanson. December, 1945, J.M. Dingley. Senecio kirkii Hook. f. Auckland: Wairongomai Valley, Te Aroha, October, 1948, J.M. Dingley.

Hymenophore annual, sometimes perennial, ceraceous, adnate, at first developing as orbicular colonies 2-10 mm across, coalescing to form effused areas to 24 x 5 cm; surface at first salmon-pink or flesh-pink, fading to pallid pink, palid buff, or cream, even or somewhat rugulose especially at margins where colonies have merged, not creviced; margin thinning out, 0.5-2 mm broad, fibrillose, white, adnate. Context white, not zoned, 250-800 µ thick, basal layer of parallel hyphae, occupying about one-half of the context, dense, often somewhat sclerotioid and tinted near the substratum, intermediate layer of vertical densely arranged hyphae; generative hyphae 3-3.5 µ diameter, walls 0.2 µ thick, hyaline, naked, branched, septate, with clamp connexions. Hymenial layer to 70 µ deep, composed of basidia, paraphyses, gloeocystidia and cystidia arranged in a dense palisade. Basidia clavate, 48-56 x 7-9 µ, projecting to 12 µ, 4-spored; sterigmata delicate, to 5 µ long. Gloeocystidia confined to the hymenial layer, sometimes projecting to 20 µ, abundant or scanty, cylindrical or fusiform, 40-80 x 6-9 µ, apices rounded, sometimes long acuminate, walls 0.5 µ thick. Cystidia confined to the hymenial and intermediate layers, abundant or scanty, not projecting, conical with long, sometimes distorted or furcate pedicels, 40-64 x 10-16 µ, densely and coarsely crystal coated on upper third, naked below. Spores elliptical, a few suballantoid, 10-12 x 4.5-5 µ, walls smooth; hyaline, 0.25 µ thick.

DISTRIBUTION. New Zealand.

HABITAT. Effused on bark or decorticated wood of dead branches.

Hymenophorum annuum, interdum perenne, ceraceum, adnatuin, effusum; superficie salmonea vel carnea, aequa vel rugulosa, non rimosa. Hyphae contextus fibulatae, 3-3.5 µ diam., nudae. Basidia clavata, 48-56 x 7-9 µ, 4 sporis. Gloeocystidia cylindricalia vel fusiformia, 40-80 x 6-9 µ. Cystidia conica, 40-64 x 10-16 µ, crystallis crassis tecta. Sporae ellipticae, aliquot suballantoides, 10-12 x 4.5-5 µ, laeves, hyalinae.

P. coprosmae resembles P. incarnata in several features, but differs in the conical cystidia, larger spores, and especially in the copious development of the basal layer, which may occupy more than half the bulk of the context. As with P. incarnata, the species shows many variations in different collections. Colour of the surface may be flesh-pink or salmon; on drying it changes to pallid pink, cream tinged with pink, or buff. Gloeocystidia may be abundant or scanty, and vary appreciably in length and shape. Cystidia also vary in size, numbers, and length of the stout often furcate pedicels. Basal hyphae become densely compacted towards the substratum, often appearing; almost sclerotioid and sometimes tinted fuscous. Some collections may be perennial, indicated by several obscure zones of cystidia and gloeocystidia
P. coprosmae and P. incarnata fall within the section "Coloratae" of Bourdot & Galzin (1928, 319) because of:surface colour, ceraceous context and suballantoid spores. P. coprosmae does not agree with any overseas species seen in Kew herbarium. It has similar marginal and growth features to P. aurantiaca (Bres.) H. & L., differing in colour, appreciably smaller spores of different shape; and smaller basidia. According to J. Eriksson (1950, 14) spores of that species are ovate, 14-20 x 7-12 µ.

Wellington; Lake Papaetonga, 50ft, October, 1930; G.H.C., type collection, P.D.D. herbarium, No. 3719

Lamprocystidia more or less conical, thick-walled, encrusted, 35-115 x 12-20 µm, hyaline, rarely basally yellowish. Encrustations covering 30-80% of the cystiddal surface. Spores hyaline, thin-walled; cylindrical, 9-11.5 x 4-5 µm.

Peniophora coprosmae is a good species of Peniophora s. str. and closely related to P. incarnate (Pers.:Fr.) Karsten. It differs from this species by a more strongly developed and denser subiculum, and the concentration of both lamprocystidia and gloeocystidia in the hymenium, as already indicated by Cunningham (1963).

Holotype: on Coprosma robusta Raoul, New Zealand, Wellington, Lake Papaitonga, coll. G.H. Cunningham, Oct. 1930 (PDD 3719).