Holotype of H. fusco-aurantiacus (Stev.) (K): 'In litter under forest, Keith George Park, Wellington, N.Z.; leg. Stevenson (645), 15.VI.1949'. - Herb. HK. ZT 68/558: 'Near Rahiri Lodge, Mt. Egmont, N.Z.; leg. Horak, 17.VI.1968'. :

Pileus 15-45 mm diam., conic to campanulate, umbo present, sooty brown to dark brown, occasionally with faint olive tints, pale yellowish towards the striated margin, densely covered with concolorous, radially arranged fibrils, viscid when moist. Lamellae adnexed to free, yellowish when young turning grey-yellow to orange, gill edge concolorous, even. Stipe 30-60 x 3-6(-10) mm, tapering towards the base, slightly fusoid, lemon yellow, paler at the base, dry, covered with longitudinal fibrils, fistulose, single. Context yellowish" with a brown layer beneath the cuticle. Taste and odor not distinctive" Chemical reactions on pileus: KOH - negative. Spores 7-10 x 4-5.5 µm, ovoid, inamyloid, smooth. Basidia 40-52 x 6-9 µm, 4-spored. Cystidia lacking. Cuticle a cutis consisting of repent, cylindric, slightly gelatinized hyphae (2-7 µm  diam.), subcutis of chains of subfusoid cells, brown, plasmatic pigment present. Clamp connections numerous.

In soil amongst litter and mosses under Weinmannia racemosa, Beilschmiedia tawa, Metrosideros, Schefflera, etc. New Zealand.

The N.Z. collections studied which are referable to H. fusco-aurantiaca (Stev.) appear to be conspecific with H. spadicea (Fr.), in spite of the fact that some minor characters are different. According to the original description H. inocyboides Heim (1967) collected under oak in New Guinea, also very much resembles H. spadicea (Fr.).