Hygrophorus fuscoaurantiacus Stevenson (28 D) = Hygrocybe fuscoaurantiaca (Stevenson) comb. nov. (Basionym: H. fuscoaurantiacus Stevenson, Kew Bull. 16: 381, 1962.)

SPECIMENS: NZ: NA, Waitakere Ranges: Mill Bay, ZT 1014; Karamatura Stream, ZT 1024.

Pileus -45 mm, hemispherical or conical becoming convex to expanded with low umbo; dark red-brown or black-brown, fading to olive green, paler towards margin; viscid, glabrous to minutely fibrillose or radially wrinkled, hygrophanous, striate. - Lamellae 14-20 (1-3) adnexed to emarginate-adnate, ventricose, up to 4 mm wide; red-brown to orange brown, paler or yellowish towards edges, occasionally with green tint, edges entire, obtuse. - Stipe 25- 60 x 35 (-10) mm, cylindrical, subfusoid to attenuate] towards base, rarely equal; yellow to orange (with red tint), grey-green to whitish near base; subviscid (in wet condition), dry becoming glabrous, hollow, brittle, single to caespitose. - Context dark brown to dark olive beneath cuticle of pileus, orange-yellow- in upper portion of stipe, pale green to whitish in base of stipe. - Odour and taste not distinctive. - Chemical reactions on pileus: KOH - negative. Spores 6-9 x 3.5-5.5 um, ellipsoid, constricted in dorso-ventral view. - Basidia 30-50 x 6- 9 um, 4-spored. - Cystidia absent - Pileipellis an ixocutis of cylindrical, slightly gelatinised hyphae (3-8 um diam.), with reddish-brown (KOH) plasmatic pigment; clamp connections present (Pl. 1, Fig. 7). .

DISTRIBUTION: NZ (NA, W).

ECOLOGY: Scattered; saprobic on soil among litter of Beilschmiedia, Leptospermum scoparium, and Kunzea ericoides or in broadleaved-conifer forests with tree ferns. May-July.

ICON.: Stevenson (1962: 381).

TYPE: NZ: W, Wellington, Keith George Park, under Beilschmiedia tawa, 15 vi 1949, Stevenson, K 645.

[Notes from Kew Type specimen, PRJ 2010] Kew images.

Pileus 2-4.5 cm. diam., blackish brown, paler with orange or green tints at first, matt, becoming covered in age with radiating fibrils; flesh yellow with a brown layer immediately under the pellicle. Gills free to adnexed, deep, rather distant, rather thick, pinkish orange with yellow margins. Stipe 4-6 X 0.5-1 cm., orange to scarlet, hollow, sometimes grooved and split. Spores 10-11 X 5-6 µm., oblong, hyaline, thin-walled. Basidia 40-45 X 6-9 µm., four-spored.

habitat; in litter under forest, Keith George Park, Wellington, 30.5.1949 & 15.6.1949; Levin, 22.6.1958; all Stevenson.

Pileus 2-4.5 cm. Diam., atro-brunneus, primo pallidior, aurantiaco vel viridi tinctus, impolitus, senectute radialiter fibrillosus; came intus flavida sub cuticula pilei brunnea. Lamellae liberae vel adnexae, latae, subdistantes, crassiusculae, roseo-aurantiacae, ad aciem luteolae. Stipes 4-6 X 0.5-1 cm., ex aurantiaco miniatus, cavus, interdum canaliculatus fissusque. Sporae 10-11 X 5-6 µm, oblongae, hyalinae, teniuter tunicatae.

Typus: Stevenson 645