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Taxonomy

Collection 1000148 (held at herbarium JE) is Hebeloma nauseosum. It is the holotype of heterotypic synonym Hebeloma gigaspermum Gröger & Zschiesch. (1981).

Description

  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000148 was collected by F. Gröger on 28th September 1978 in Siebleber Teich, Gotha, Thuringia, GERMANY (approx. 50.937°N, 10.7632°E, altitude approximately 280 m above sea level - Google maps). The ectomycorrhizal family Salicaceae (genus Salix) was present.

    The surrounding habitat was described as not recorded.

    According to the GPS data the collection was in the Central European mixed forests WWF ecoregion The World Wildlife Fund (WWF) have divided the world into 867 terrestrial ecoregions. The ecoregion here is estimated by mapping from the GPS coordinates of the collection using data made available by Dinerstein et al (2017). Use this webtool to explore the ecoregions visually or see a full list of current ecoregions on Wikipedia. (biome: Temperate Broadleaf & Mixed Forests) and Koppen climate code Dfb (Cold, no dry season, warm summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: no.

    Pileus: 18–50 mm diameter; shape convex, umbonate broadly; margin characters reflexed; viscosity tacky when moist; spotting no; hygrophanous no; colour variation not recorded; with colour at centre ochraceous, buff-yellow; and colour at margin pale yellow, pinkish buff; with remains of universal veil no.

    Lamellae: attachment adnate, emarginate; maximum depth up to 8 mm; number of complete lamellae 37; tears absent; white fimbriate edge not recorded.

    Stipe: 20–60 x 3–6 {median} x 3–6 {basal} mm; stipe Q 6.7–10.0; base cylindrical, tapering; floccosity fibrillose; rooting not recorded; mycelial chords not recorded.

    Context: texture firm; stipe interior hollow, stuffed; stipe flesh discolouring from base yes; slenderness measure 9.7; smell sacchariolentia, sweet; taste bitter weakly.

    Spore deposit colour: analysis not yet complete.

    Exsiccata: pileus blackening, stipe blackening.

  • arrow_drop_downarrow_drop_upMicroscopic description

    Spores: shape amygdaloid, limoniform; colour through microscope brown; guttulate no; papillate very strongly; Spore Code: O3; O4; P2; D3; D4.

    Basidia: 39.8–45.1 x 8.9–11.1 μm; ave. Q = 4.3; basidia spore nature not recorded.

    Cheilocystidia: main shape capitate, clavate, gently clavate, cylindrical; special features not recorded; Cheilocystidia Ratios: A/M = not recorded; A/B = not recorded; B/M = not recorded.

    Pleurocystidia: no.

    Ixocutis: epicutis thickness (measured from exsiccata) not recorded; ixocutis maximum hyphae width 4 μm; ixocutis hyphae encrustation not recorded; shape of trama elements beneath subcutis not recorded.

    Caulocystidia: analysis not yet complete.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(13.7) 14.1–16.5 (16.8)15.215.30.730
    Width (µm)(7.7) 8.0–9.3 (9.8)8.68.40.470
    Q(1.52) 1.60–1.95 (2.02)1.781.760.1
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1978)11.53 °C3.49 °C45.79 mm
    Collection month (9/1978)16.20 °C7.75 °C76.08 mm
    Max month (1978)20.29 °C10.38 °C92.14 mm

Compare this collection to its species

This section compares data for this collection against its true species and also against the most likely species as determined by our identifier. More often than not these will be the same species, but where this is not the case, the data may be used to help explain why the identifier got it wrong.

Image gallery

Detailed statistics

Spore measurementsMy valueSpecies mean valuePosition
Count 50.0 42.37 16th–21st/30
Average length 15.2 14.05 4th/31
Average width 8.6 8.05 2nd/31
Standard deviation of length 0.73 0.91 21st–22nd/28
Standard deviation of width 0.47 0.44 11th–12th/28
Median length 15.3 13.89 2nd–4th/28
Median width 8.4 7.94 2nd–7th/28
Minimum length 13.7 12.17 3rd/28
Minimum width 7.7 7.15 5th/28
Low length 14.1 12.57 1st–2nd/28
Low width 8.0 7.36 3rd/28
High length 16.5 15.24 3rd/28
High width 9.3 8.63 1st–2nd/28
Max length 16.8 15.85 6th–7th/28
Max width 9.8 8.93 2nd–3rd/28
Spore featureValueCommonalities
Ornamentation O3; O4 100% of collections; 13% of collections
Perispore loosening P2 80% of collections
Dextrinoidity D3; D4 90% of collections; 50% of collections