Lentinellus cremeus G. Stev. 1964
Details
Lentinellus cremeus G. Stev., Kew Bull. 19 21 (1964)
Nomenclature
G. Stev.
G. Stev.
1964
21
ICN
Lentinellus cremeus G. Stev. 1964
NZ holotype
species
Lentinellus cremeus
Classification
Descriptions
Lentinellus cremeus G. Stev. 1964
[GS] Pileus 1.5-3.5 cm diam., creamy white to deep cream, orbicular to reniform, convex becoming depressed, margin down-rolled, matt to almost velvety; flesh white, firm, continuous with that of stipe. Gills adnexed to sinuate, creamy white, thin, crowded, margins lacerate. Stipe 1-2 x 0.2- 0.3 cm, excentric to lateral, creamy, fibrillose to velutinate, tapered downwards, swollen at base, tough, solid. Spores 3.5 x 2.5 μm, faintly amyloid (Fig. 42). Hymenophoral trama of broad hyphae, some 10 μm diam., thinwalled. Cuticle of closely woven thin-walled hyphae, 2-3 μm diam. [EH] It is difficult to comprehend why Stevenson placed this fungus, which is common in the New Zealand bush, in Lentinellus. All characters indicate an obvious relationship with Pleurocollybia, a genus not previously known from New Zealand. Spores roundish, hyaline, weakly amyloid, smooth, 2.5-3 X 2.5 um. [Miller] The type (K) has small, nonamyloid, subglobose, smooth spores 3.5 x 2.5 um. Basidia 13-15 x 3.5-4.0 um. clavate, 4-spored. thin-walled. The trama is nonamyloid, thin-walled and quite broad. [JAC] Cap hyphae glassy walled with nodulose excrescences, unclamped. No cystidia. Spores possibly briefly and faintly amyloid. Including apiculus length=4.2–5.0µm (µ=4.6, σ=0.26), width=3.0–4.0µm (µ=3.4, σ=0.23), Q=1.2–1.6µm (µ=1.38, σ=0.10), n=20. Does not posess siderophilous granules of either macro or oligo type. This does not have the spores of the similar Clitocybe albida which has ovoid spores and filiform cystidia on at least some gill, but also has obvious clamps and decurrent gills. The lack of clamps in this specimen is puzzling. Recent material identified as P. cremea is within the Lyophyllaceae and is an Ossicaulis sister to Ossicaulis lignatilis, and O. lachnopus and is a brown rotter. These characters fit with this type. However that recent material also shows siderophilous granules and clamps. The absence of granules and clamps leads me to conclude this is not the same as recent material under that name (which can now be found under Ossicaulis). It is worth noting the gills most certainly have a lacerate edge which is probably why Stevenson placed it in Lentinellus
Lentinellus cremeus G. Stev. 1964
[Notes from Kew Type specimen, PRJ 2010] Kew images.
Lentinellus cremeus G. Stev. 1964
Pileus 1.5-3.5 cm diam., creamy white to deep cream, orbicular to reniform, convex becoming depressed, margin down-rolled, matt to almost velvety; flesh white, firm, continuous with that of stipe. Gills adnexed to sinuate, creamy white, thin, crowded, margins lacerate. Stipe 1-2 x 0.2-0.3 cm, excentric to lateral, creamy, fibrillose to velutinate, tapered downwards, swollen at base, tough, solid. Spores 3.5 x 2.5 µm, faintly amyloid (Fig. 42). Hymenophoral trama of broad hyphae, some 10 µm diam., thin-walled. Cuticle of closely woven thin-walled hyphae, 2-3 µm diam.
On fallen wood, Tararuas, Levin, 18.6.1949) Stevenson (type).
Pileus l.5-3.5 cm diam., cremeo-albus usque intense cremeus, orbicularis usque reniformis, convexus deinde depressus, margine deorsum involute, laevis usque fere velutinus; caro albida, firma, cum stipite continua. Lamellae adnexae usque sinuatae, cremeo-albae, tenues, confertae, marginibus laceratis. Stipes 1-2 x 0.2-0.3 cm, excentricus usque lateralis, cremeus, fibrillosus usque velutinosus, deorsum attenuatus, basi tumidus, tenax, solidus. Sporae 3.5 x 2.5 µm, levissime amyloideae, Trama hymenophoralis ex hyphis latis nonnunquam 10 µm diam. sistens, parietibus tenuibus. Cuticula ex hyphis dense intertextis 2-3 µm diam. sistens, parietibus tenuibus.
Typus: Stevenson 667.
Taxonomic concepts
Lentinellus cremeus G. Stev. 1964
Lentinellus cremeus G. Stev. (1964)
Global name resources
Notes
typification
on fallen wood, [New Zealand], Tararuas, Levin, 18.6.1949, Stevenson (type K)
Metadata
1cb1b416-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2000
12 October 2004