Entoloma captiosum E. Horak 2008
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Entoloma captiosum E. Horak 2008
Entoloma captiosum E. Horak 2008
Biostatus
Nomenclature
E. Horak
E. Horak
2008
114
ICN
Entoloma captiosum E. Horak 2008
NZ holotype (PDD 71138)
species
Entoloma captiosum
Classification
Associations
Descriptions
Holotype (K): 'Johnson's Hill, Wellington, N.Z.; leg. Stevenson 642, 12.VI.1949'. - Herb. HK. ZT 68/124 (PDD 27023): 'Nelson Creek, Kopara, Ngahere, Prov. Westcoast, N.Z.; leg. Horak. 10.111.1968'. Herb. HK. ZT 69/30: ‘Matakitaki, S of Murchison, Prov. Nelson, N.Z., leg. Horak, 28.1.1969'.
Pileus 10-30 mm diam., hemispherical or convex at first, becoming conical, aged carpophores mostly plane with pronounced papilla at the centre, white turning pink or pink-beige, very densely covered by radial, white fibrils, forming a felt-like weft or sometimes also with fine squamules, membranous, striate near the margin, dry. Lamellae (L 8-14, l 3) adnate to adnexed, occasionally emarginate, white becoming deep pink, gill edge white and fimbriate. Stipe 10-40 x 1-3 mm, cylindrical, often bent, white or hyaline, densely covered by white, silky fibrils, apically also pruinose (in young specimens), dry, hollow, fragile. Context white. Taste and odor strongly farinaceous.
Spores 8-10 x 6-8.5 µm, 5-sided. Basidia 30-35 x 8-10 µm, 4-spored. Cheilocystidia 35-60 x 7-12 µm, capitate-fusoid, sometimes even lecythiform, often irregularly constricted, membrane thin-walled and hyaline. Pleuro- and caulocystidia none. Cuticle a cutis of repent, cylindrical hyphae (6-9 µm diam.), membrane not gelatinized, pigment lacking or encrusting. Clamp connections absent, or very scanty.
Spores 8-10 x 6-8.5 µm, 5-sided. Basidia 30-35 x 8-10 µm, 4-spored. Cheilocystidia 35-60 x 7-12 µm, capitate-fusoid, sometimes even lecythiform, often irregularly constricted, membrane thin-walled and hyaline. Pleuro- and caulocystidia none. Cuticle a cutis of repent, cylindrical hyphae (6-9 µm diam.), membrane not gelatinized, pigment lacking or encrusting. Clamp connections absent, or very scanty.
On rotten wood or sawdust of Nothofagus spp., Dacrydium cupressinum or Podocarpus spp. New Zealand.
Stevenson 1962: 1.c.
E. niveum is closely related to E. albidum Hesler which differs in several minor characters only. According to Hesler the North American species does not grow on rotten wood but on soil.
The relationship of E. niveum with E. pluteoides Hk. is obvious but the two species can be easily separated by the following characters: colour and structure of the cuticle, attachment of the lamellae, presence or absence of cystidia and localization of the pigment.
The relationship of E. niveum with E. pluteoides Hk. is obvious but the two species can be easily separated by the following characters: colour and structure of the cuticle, attachment of the lamellae, presence or absence of cystidia and localization of the pigment.
Material. - New Zealand: Wellington, Johnson's Hill, 12.VI.1949, leg. Stevenson (K, 642, holotype). - For further collections see Horak (1973:31).
Habitat: - On rotten wood of Nothofagus sp. and conifers. - New Zealand.
Illustrations. - Stevenson (1962:1.c.); Horak (1973:32).
[Notes from Kew Type specimen, PRJ 2010] Kew images.
Pileus 2-4 cm. diam., snow-white, hemispherical at first, then becoming plane, covered with a fine, felt like weft; flesh creamy-white. Gills adnexed, moderately crowded, creamy becoming stained pale-pink. Stipe 3-4 cm. x 4 mm., white, with ochraceous tinge at base, silky-striate, more or less equal, solid, creamy coloured flesh continuous with that of cap. Spores strongly angled, overall shape rather cuboid, 7 x 10-11um; print dark-pink; no cystidia.
rooting in soil among litter, Johnson's Hill, Wellington, 12.9.1949, Stevenson.
Pileus 2-4 cm. diam., niveus, ex hemisphaerico explanatus, tela tomentosa delicatula vestitus; caro cremeo-albida. Lamellae adnexae, subconfertae, cremeae, dein pallide roseo-tinctae. Stipes 3-4 cm. x 4 mm., albus, basi ochraceo-tinctus, sericeo-striatus, subaequalis, solidus, carne cremea et cum carne pilei continua. S'orae 7 x 10-11um, valde angulatae, prope cubicae, in cumulo obscure roseae. Cystidia nulla.
Stevenson 642.
Taxonomic concepts
Entoloma niveum G. Stev.
Entoloma niveum G. Stev. (1962)
Entoloma niveum G. Stev. (1962)
Entoloma stevensoniae E. Horak
Entoloma stevensoniae E. Horak (1980)
Global name resources
Collections
Identification keys
Notes
taxonomic status
E. Horak (2008) considers Stevenson's type collection of E. niveum to be in poor condition and mixed. One component relating to his concept of E. sericellum, a northern hemisphere species which he considers present in indigenous habitats. For the second component he described the new species E. capitiosum.
typification
New Zealand, Westland, Lake Paringa, Cattle Track, 80 m, on rotten wood in coastal broadleaf forest dominated by Nothofagus menziesii, 18 Mar. 2000, E. & A. Horak (holotype PDD 71138, isotype ZT 8713).
Metadata
27e662f7-a199-40bf-8483-3e0d78b1e077
scientific name
Names_Fungi
12 October 2007
14 June 2024