Humidicutis mavis (G. Stev.) A.M. Young 2005

Caption:

Details

Name scientific

Humidicutis mavis (G. Stev.) A.M. Young 2005

Preferred name

Humidicutis mavis (G. Stev.) A.M. Young 2005

Biostatus

Origin

Occurrence

Georegion

Schema

Biostatus source

Comment

Indigenous, non-endemic

Present

New Zealand

Political Region

Anon

Also present in Australia

Nomenclature

Authors

(G. Stev.) A.M. Young

Original authors

G. Stev.

Combination authors

A.M. Young

Publication place

Young, A.M. 2005: Fungi of Australia: Hygrophoraceae. CSIRO Publishing.

Year published

2005

Publication page

159

Nomenclatural code

ICN

Basionym

Hygrophorus mavis G. Stev. 1963 [1962]

Taxonomic rank

species

Canonical form

Humidicutis mavis

Classification

Kingdom

Fungi

Phylum

Basidiomycota

Class

Agaricomycetes

Order

Agaricales

Family

Hygrophoraceae

Genus

Humidicutis

Species

mavis

Synonyms

Associations

View full associations record

Association type

Associated organism

Association source

has host

Cyathea

PDD (1 records from [Not available].)

has host

Dicksonia squarrosa (G.Forst.) Sw.

PDD (1 records from [Not available].)

has host

Nothofagus

PDD (4 records from [Not available].)

Descriptions

Horak, E. 1971: A contribution towards the revision of the Agaricales (Fungi) from New Zealand. New Zealand Journal of Botany 9(3): 403-462.

Hygrocybe mavis (G. Stev.) E. Horak 1971

Notes

Hygrophorus mavis Stevenson (28 D) = Hygrocybe mavis (Stevenson) comb. nov. (Basionym: H. mavis Stevenson, Kew Bull. 16: 377, 1962)

Horak, E. 1973: Fungi Agaricini Novazelandiae I-V. Beihefte zur Nova Hedwigia. 43.

Hygrocybe mavis (G. Stev.) E. Horak 1973

Collections Examined

Holotype (K): 'Levin, N.Z.; leg. Stevenson (654) 18.VI.1949'. - Herb. HK. ZT 68/144: 'Lake Hochstetter, Prov. Westcoast'' N.Z.; leg. Horak, 12.III.1968'.

Description

Pileus 10-40 mm diam., conical when young later becoming plano-convex, aged specimens radially splitting, ivory or whitish, silky fibrillose, slightly striated towards the margin of the pileus, dry. Lamellae free to adnexed, white, distant, gill edge concolorous, even. Stipe 20-60 x 3-8 mm, cylindric, equal or attenuated at the base, concolorous with pileus, silky, dry, hollow, fragile, often twisted. Context white. Taste and odor not distinctive. Chemical reactions on pileus: KOH, HCl and NH3 - negative. Spores 7-10 x 4.5-5 µm, ellipsoid, smooth, inamyloid. Basidia 33-42 x 7-8 µm, 4-spored. Cystidia absent. Cuticle a cutis of repent, cylindric, hyaline, not gelatinized hyphae (2-5 µm diam.). Clamp connections lacking.

Habitat

In soil in Dacrydium-Podocarpus forests, rarely under Nothofagus spp. New Zealand.

Illustrations

Stevenson 1962: Fig. 1/1 a,b.

Notes

H. mavis (Stev.) has much the stature and the colours of H. purus Peck from North America but the dry pileus and stipe as well and the absence of clamp connections are clearly distinguishing characters.

Johnston, P.R. 2010: Kew Type Specimens - images and notes from P.R. Johnston, 2010.

Hygrophorus mavis G. Stev. 1963 [1962]

Notes

[Notes from Kew Type specimen, PRJ 2010] Other Stevenson collections in K, GS 319, 700, 1080, 1382, 1395

Stevenson, G. 1963: The Agaricales of New Zealand: IV. Kew Bulletin 16(3): 373–384.

Hygrophorus mavis G. Stev. 1963 [1962]

Description

Pileus 2-4 cm, diam,, snow-white becoming slightly creamy at centre, plano-convex with a broad umbo, silky fibrillose, splitting radially; flesh pure white, fragile. Gills free or slightly adnexed, moderately distant, rather thick, surface wrinkled white. Stipe 2.5-4.5 X 0.3-0.6 cm., white, silky, smooth, hollow, fragile, more or less equal. Spores 7-8 X 5 µm., oblong, hyaline, smooth. Basidia 4.0 X 6-8 µm., four-spored. Noticeable fungus smell.

Habitat

habitat: under forest and scrub, Egmont, 17.6.1948, Stevenson-, Levin, 18.6.1959, Stevenson, Lowry Bay. 6.7.1949, Stevenson; Levin, 22.6.1958, Stevenson, Rotoiti, 16.5.1956 E- Kidson, Kapiti, 22.6.1958, Mavis Davidson.

Latin

Pileus 2-4 cm. diam,, niveus, demum ad discum leviter cremeus, plano-convexus, late umbonatus, sericeo-fibrillosus, demum radialiter fissuratus; carne nivea fragili. Lamellae liberae vel leviter adnexae, modice distantes, subcrassae, rugosae, albae. Stipes 2.5-4.5 X 0.3-0.6 cm. candidus, sericeus, laevis, cavus, fragilis, plus minus acqualis. Sporae 7-8 X 5 µm, oblongae, hyalinae, laeves. Odor distincte fungoideus.

Typification

Typus: Stevenson 654.