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Humidicutis pura (Peck) E. Horak 1990

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Humidicutis pura (Peck) E. Horak, New Zealand J. Bot. 28 294 (1990)
Humidicutis pura (Peck) E. Horak 1990
Segedin, B.P.; Pennycook, S.R. 2001: A nomenclatural checklist of agarics, boletes, and related secotioid and gasteromycetous fungi recorded from New Zealand. New Zealand Journal of Botany 39(2): 285-348.

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Recorded in error
New Zealand
Political Region

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(Peck) E. Horak
Peck
E. Horak
Horak, E. 1990: Monograph of the New Zealand Hygrophoraceae (Agaricales). New Zealand Journal of Botany 28(3): 255-306.
1990
294
ICN
Hygrophorus purus Peck 1874 [1872]
species
Humidicutis pura

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Fungi
Basidiomycota
Agaricomycetes
Agaricales
Hygrophoraceae
Humidicutis
pura

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Horak, E. 1990: Monograph of the New Zealand Hygrophoraceae (Agaricales). New Zealand Journal of Botany 28(3): 255-306.

Humidicutis pura (Peck) E. Horak 1990

SPECIMENS: NZ: G, Urewera N. P., ZT 1449. - N, Reefton, Awarau River Valley, ZT 2011. - W, Levin, 18 vi 1949, Stevenson, K654 (H. mavis Stev., type). - WL, S of Lake Hochstetter, ZT 68/144.
Pileus -60 mm, conical becoming convex to umbonate-plane, margin radially splitting in aged : specimens; ivory to whitish; dry, silky to radially fibrillose, slightly striate at margin. - Lamellae distant to crowded, free to adnexed, up to 6 mm wide; white, edges entire, concolorous. - Stipe 20-60 x 3-8 mm, cylindrical, equal or attenuated towards base, sometimes subfusoid; white; dry, silky, hollow, very brittle, often twisted, single. - Context white, fragile. -Odour and taste not distinctive. -Chemical reactions on pileus: KOH, HCI, and NH3 - negative. Spores 6-9 (-10) x 4-5 um, ellipsoid. - Basidia 30-42 x 6-8 um, 4-spored, with medallion-like clamp connection at basal septum. - Cystidia absent - Pileipellis a cutis of repent, cylindrical hyphae (25 um diam.), hyaline membrane not gelatinised, minutely encrusted with pigment; clamp connections absent on septa of cuticular hyphae (Pl. 1, Fig. 8).
DISTRIBUTION: NZ (G, W, N, WL), USA.
ECOLOGY: Common; saprobic on soil among litter in beech forest (Nothofagus menziesii-N. fusca) or among Sphagnum in broadleaved-conifer forests (Leptospermum scoparium, Quintinia, Dacrydium). March-June.

ICON.: Stevenson (1962: 337); Horak (1973: 131).

All characters observed on the North American Hygrophorus purus Peck essentially agree with those described for H. mavis Stev. which in New Zealand is widely distributed both in Nothofagus and broadleaved-conifer forests.

The revision of authentic North American material kept in the Hesler collections (MICH) demonstrated that both the macroscopic and the microscopic data for Hygrophorus purus Peck are obviously erroneous (Hesler & Smith 1963: 214). The surface of pileus and stipe lacks gelatinised hyphae and therefore this fungus is misplaced in subsect. Psittacini. Clamp connections are absent or very rare on septa of the pileipellis but occur regularly at the base of the basidia. Hence the macroscopic and microscopic features clearly fit the generic circumscription of Humidicutis (Singer) Singer (Horak 1968: 281), and accordingly its transfer to this taxon is proposed.

TYPE: USA: North Carolina, Highlands, 28 viii 1939, Hesler,MICH 12290 (cf. Hesler & Smith 1963: fig. 62, authentic material of H. purus Peck).

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Humidicutis pura (Peck) E. Horak 1990
Humidicutis pura (Peck) E. Horak 1990
Anon.
Humidicutis pura (Peck) E. Horak 1990
Humidicutis pura (Peck) E. Horak (1990)
Horak, E. (1990)
Humidicutis pura (Peck) E. Horak 1990
Humidicutis pura (Peck) E. Horak (1990)
Segedin, B.P.; Pennycook, S.R. (2001)
Humidicutis pura (Peck) E. Horak 1990
Hygrophorus purus Peck 1874 [1872]
Hygrophorus purus Peck (1874) [1872]
Peck, C.H. (1874)
Hygrophorus purus Peck 1874 [1872]
Hygrophorus purus Peck (1874) [1872]
Segedin, B.P.; Pennycook, S.R. (2001)
Humidicutis pura (Peck) E. Horak 1990

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Humidicutis pura (Peck) E. Horak 1990
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1cb1c268-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
17 July 2001
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