Holotype (PDD 27082); Isotype (Herb. HK. ZT. 68/472): Puponga, Prov. Nelson, N.Z.; leg. Horak, 17.V.1968'.

Pileus 20-45 mm diam., convex later becoming broadly umbonate or concave. red-yellow to deep orange-red, viscid, with minute radially arranged concolorous fibrils, margin striated. Lamellae emarginate-adnexed to adnate, varying from yellow to red-orange, gill edge crenulate, concolorous, ventricose. Stipe 25-60 x 4-10 mm, cylindric or attenuated towards the base, red-orange, paler towards the base to yellowish-grey, fibrillose, viscid, hollow, fragile. Context reddish-orange. Odor and taste not distinctive. Chemical reactions on pileus: KOH, NH3 and HCl - negative. Spores 7.5-10 x 5-5.5 µm, ellipsoid, smooth, inamyloid. Basidia 35-40 x 7-8 µm, 4-spored. Cystidia absent. Cuticle consisting of erect, cylindric, strongly, gelatinized hyphae (3-6 µm diam.) forming a palisade, subcutis of cylindric hyphae 5-90 µm diam. Clamp connections present.

In soil under Leptospermum scoparium and L. ericoides. New Zealand.

Pileo 20-45 mm lato, e convexo umbonato usque ad concavo, rubroluteo vel aurantiaco, viscido, striato. Lamellis emarginato-adnexis, aurantiacis vel rubro-luteis. Stipite 25-60 x 4-10 mm, cylindrico vel attenuato basim versus, pileo concolori, fibrilloso, viscido, cavo. Sporis 7.5-10 x 5-5.5 µm, ellipticis. Cystidiis nullis. Epicute ex hyphis suberectis gelatinosisque ixodermium formantibus, septis fibulatis. Ad terram in silvis Leptospermum. Novazelandia.

H. cavipes shows some affinities with the European H. intermedia (Pass.) and H. elegans Hk. from New Zealand, but is clearly distinguished from the two taxa by its microscopical characters.

Holotypus (PDD 27082): 'Puponga, N.Z.; leg. Horak, 17.V.1968'.

SPECIMENS: NZ: NA, Waitakere Ranges. Lucy Cranwell Track, ZT 748. - N, Reefton, Awarau River, Larry's Creek, ZT 2012.

Pileus ~ 5 mm, convex to subcampanulate or broadly umbonate later becoming expanded with subdepressed centre; yellow(-red) to brilliant orange-red; viscid, smooth to minutely fibrillose, hygrophanous, margin striate. - Lamellae 18-26 (1 -3) adnate to emarginate-adnexed, ventricose; yellow to orange-red, edges concolorous, entire or crenulate. - Stipe 25 - 60 x 4 -10 mm, subfusoid or cylindrical with attenuating base, occasionally subclavate; orange to orange-red, gradually paler or yellowish-grey-whitish towards base; viscid in wet condition, dry minutely fibrillose, hollow, fragile, often compressed, single or caespitose. - Context reddish-orange, yellowish to whitish in base of stipe, brittle. - Odour and taste not distinctive. - Chemical reactions on pileus: KOH, HCI, and NH₃ - negative. Spores 7-10 x 4.5-5.5 um, ellipsoid. -Basidia 35 -45 x 7-8 um, 4-spored. - Cystidia absent. - Pileipellis an ixocutis of cylindrical, strongly gelatinised hyphae (3-6 um diam.), with pale yellow (KOH) plasmatic pigment; clamp connections present (Pl. 1, Fig. 7).

DISTRIBUTION: NZ (NA, N).

ECOLOGY: Scattered; saprobic on soil among litter predominantly under Leptospermum and Kunzea (with Sphagnum) and in broadleaved-conifer forests. March-May.

ICON.: Horak (1973: 139).

TYPE: NZ: N, Collingwood, Puponga, under Leptospermum scoparium-Kunzea ericoides, 17  v1968, Horak, PDD 27082.