Leptospermum ericoides A. Rich. Auckland: Huia, October, 1953, J.M. Dingley. Leptospermum scoparium Forst. Auckland: Kauri Park, Birkenhead, July, 1946, J.M. Dingley, type collection, P.D.D. herbarium, No. 4562; Huia, March, 1953, J.M. Dingley. Metrosideros tomentosa A. Rich. Auckland: Coromandel coast, November, December, 1946, J.M. Dingley.

Hymenophore annual or perennial, adnate, ceraceous-coriaceous, effused, forming linear areas to 30 x 3 cm., or irregular areas with a few outlying islands; surface white, becoming cream or alutaceous, sometimes tinted reddish-buff, laterally closely creviced; margin thinning out, white or tinted brown, abrupt, sometimes receding, membranous, adnate. Context white, 200-400 µ thick, of 1-3 obscure layers, defined partly by masses of crystals and tinted hyphae, mainly by rows of gloeocystidia, each layer composed of a narrow base of parallel hyphae, and an intermediate layer of compact vertical hyphae; generative hyphae 4-5 µ diameter, wall 0.5 µ thick, naked, hyaline, branched, septate, with clamp connections. Hymenial layer to 50 µ deep, of basidia, paraphyses and gloeocystidia. Basidia subclavate, 12-16 x 4-5 µ, 2-4-spored; sterigmata slender, to 8 µ long. Paraphyses subclavate, similar to but smaller than the basidia. Gloeocystidia extending from the base of each context layer, projecting to 30 µ, or not, cylindrical or flexuous-cylindrical, 80-160 x 5-8 µ, wall 0.5-0.75 µ thick, contents densely granular and orange. Spores elliptical, some apiculate, 5-6 x 3-3.5 µ, wall smooth, hyaline, 0.2 µ thick.

DISTRIBUTION. New Zealand.

HABITAT. Effused on dead bark or decorticated wood.

Hymenophorum ceraceo-coriaceum, adnatum, effusum; superficie alba deinde cremea vel alutacea, laterale rimosa. Contextus 1-3 stratis, multis crystallis et hyphis tinctis divisis; hyphis fibulatis, 4-5 µ diam., nudis. Basidia 12-16 x 4-5 µ, 2-4 sporis. Gloeocystidia cylindricale flexuosa, 80-160 x 5-8 µ, corpore aurantio expleta. Sporae ellipticae, 5-6 x 3-3.5 µ, laeves, hyalinae.

Gloeocystidia are long, narrow^,, flexuous-cylindrical, regularly spaced, and extend from the base to the surface of the hymenium, some projecting to 30 µ. Filled with granular orange contents, they are conspicuous and readily seen in sections; even in old specimens they are conspicuous, for they either retain the orange colour or contents appear dark-brown and resinous. When fully grown plants may consist of three definite layers, separated by zones of parallel tinted hyphae embedding masses of crystals; but as several specimens in the collections listed consist of a single layer this does not appear to be a constant feature. Crystals may be confined to the base, scattered through the context, or absent.
From other species with gloeocystidia containing bright orange contents--C. debile B. & C., C. leucoxanthum Bres., C. luridum Bres., C. leucocystidiatum Talbot and C. seriale Fr. it may be separated by the often stratose context, singularly even spacing of glococystidia, small basidia and spores.

Auckland: Kauri Park, Birkenhead, July, 1946, J.M. Dingley, type collection, P.D.D. herbarium, No. 4562

The type specimen is not in very good condition and very few basidia were intact. The gloeocystidia are sulpho-positive. The spores are hyaline, thin-walled, ellipsoid, 5-5.5 X 2.5-3.2 µm, warted, amyloid. It does not seem to be distinct from Gloeocystidiellum porosum (Berk. & Curt.) Donk.