COLLECTIONS EXAMINED: Under (1) L. scoparium, Wellington: Papakai Pa, 30.iv.1967, R. F. R. McN.; Lake Rotoaira, 3.v.1967, R, F. R. McN. (HOLOTYPE, PDD 25907); (2) Nothofagus menziesii and N. solandri var. cliffortioides. Canterbury: near Cass, 26.iv.l969, M. J. Noonan.

PILEUS: plano-convex when young, becoming centrally depressed or shallowly infundibuliform at maturity, 1.5-5 cm diam., dry, subglabrous or extremely finely felted, pallid yellow, pallid orange-yellow, or occasionally with faint apricot tints; cuticle composed of more or less repent, loosely interwoven, thin-walled, filamentous hyphae 4.5-8.5 µm. diam. with conspicuous clamp connections; margins strongly involute when young, moderately involute and often undulate and irregularly lobed at maturity. LAMELLAE: moderately crowded, deeply decurrent, repeatedly dichotomously branched 3-5 times, edges acute or occasionally bluntly rounded, 1-1.5 mm deep, pallid orange, salmon, or pallid yellowish orange at maturity. STIPE: 1.5-4 cm long, subequal or tapering basally, 3-8 mm diam. apically, 2-5 mm diam. basally, central or somewhat eccentric, solid or stuffed, dry, glabrous, subglabrous, or faintly longitudinally felted, concolorous with lamellae or sordid yellowish orange; veil absent. SPORES: spore print not obtained; spores hyaline or faintly yellowish in KOH, pseudoamyloid, broadly elliptical, short cylindrical with obtuse ends, or occasionally subreniform, minutely apiculate, germ pore absent, 5.8-7.2-(8.5) X 3.2-4.2 µm. slightly thick-walled, smooth. HYMENIUM: basidia hyaline, subclavate to clavate, 20-28 X 5-6.5 µm., 4-spored; cystidia absent but a few sterile, paraphysis-like structures present, projecting to 10 µm. beyond basidia. HYMENOPHORAL TRAMA: bilateral, mediostratum of subparallel or loosely interwoven hyphae, lateral stratum of closely packed, irregular, non-divergent hyphae; clamp connections present. CONTEXT OF PILEUS: white or tinted yellow, extremely soft, unchanging on exposure to air. TASTE: not distinctive.

HABITAT: Gregarious under Leptospermum and Nothofagus.

Pileus centraliter depressus vel breviter infundibuliformis, 1.5-5 cm diam., siccus, subglaber vel subtiliter coactus, subflavus vel subluteus. Lamellae decurrentes, bipartito furcatae 3-5 vicibus, ad 1.5 mm altae, subcroceae, salmoneae vel subluteae. Stipes 1.5-4 cm longus, basaliter decrescens, 2-8 mm diam., siccus, glaber vel subtiliter coactus, plus minusve concolor cum lamellis. Sporae late ellipticae vel brevi-cylindratae, 5.8-7.2-(8,5) X 3.2-4.2 µm., leves.

Typus: Wellington Province, Lake Rotoaira, 3.V.1967, R. F. R. McN., PDD 25907.