Holotype (K): 'Fringed Hill, Nelson; leg. Stevenson 1118, 3.V.1956'. - Herb. HK. ZT 69/130 (PDD 27013): 'Christmas-Village, Stewart Island, N.Z; leg. Horak, 13.111.1969'. - Holotype of Entoloma botanicum Stev. (K): 'Catchpole, Wellington, N.Z.; leg. Stevenson and Well. Bot. Soc.. 3.V.1958'.

Pileus 20-40 mm diam., conical or broadly convex-umbonate, margin incurved, conspicuously fibrillose, aged carpophores wrinkled or grooved (at least at the centre), dry, margin not striate, deep brown or fuscous. Lamellae adnexed or free, brownish when young, becoming deep pink-brown, gill edge concolorous, moderately crowded. Stipe 30-50 x 3-5 mm, cylindrical or attenuated upwards, dry, greybrown, densely covered by brownish fibrils, white (from mycelium) at the base, fragile, hollow, sometimes twisted. Context brownish. Odor and taste farinaceous or like cucumber.
Spores 10-12 x 9-11.5 µm, quadrate or rhomboid, with pronounced edges. Basidia 30-40 x 10-12 µm, 4-spored. Cheilo- and pleurocystidia none. Cuticle a cutis of repent or suberect, cylindrical hyphae (8-18 µm diam.), membrane thin-walled, not gelatinized, with brown plasmatic or vacuolar pigment. Clamp connections absent.

On soil under Nothofagus spp., rarely under Dacrydium-podocarpus. New Zealand.

Stevenson 1962: 1.c.

The deep brown pileus (covered by conspicuous wrinkles), the free lamellae and the rhomboid spores characterize E. nothofagi. The species grows not only under Nothofagus spp. but also in broad-leaved- and podocarpus-forests miles from the nearest stand of Nothofagus (Stewart Island).
According to its macro- and microscopical characters (see also original descriptions) E. botanicum Stev. has to be regarded as a synonym of E. nothofagi. In the field E. nothofagi can readily be confused with E. procerum Stev. but the latter species has large cheilocystidia and cuboid-tetrahedral spores.

Notes from Kew Type specimen, PRJ 2010] filed under Leptonia in K