Collection 1000222 (herbarium acc. no. ROHB01093) is the holotype of Hebeloma laetitiae.


  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000222 was collected by L. Quadraccia on 30th October 1986 in Castelporziano (Roma), Lazio, ITALY (approx. 41.7441°N, 12.403°E, altitude approximately 60 m above sea level - Google maps). The ectomycorrhizal family Fagaceae (genus Quercus) was present.

    The surrounding habitat was described as not recorded with a substrate of boggy soil.

    According to the GPS data the collection was in the Italian sclerophyllous and semi-deciduous 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: Mediterranean Forests, Woodlands & Scrub) and Koppen climate code Csa (Temperate, dry summer, hot summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: no.

    Pileus: 20–75 mm diameter; shape convex, umbonate; margin characters not recorded; viscosity tacky when moist; spotting not recorded; hygrophanous no; colour variation not recorded; with colour at centre cream, warm buff, yellowish brown, pinkish buff, pale salmon; and colour at margin not recorded; with remains of universal veil no.

    Lamellae: attachment emarginate; maximum depth not recorded; number of complete lamellae 60; tears visible with naked eye; white fimbriate edge present.

    Stipe: 25–65 x 5–9 {median} x 6–9 {basal} mm; stipe Q 5.0–7.2; base clavate, cylindrical; floccosity floccose; rooting no; mycelial chords no.

    Context: texture firm; stipe interior stuffed; stipe flesh discolouring from base no; slenderness measure 6.3; smell raphanoid weakly; taste bitter weakly, raphanoid weakly.

    Spore deposit colour: analysis not yet complete.

    Exsiccata: analysis not yet complete.

  • arrow_drop_downarrow_drop_upMicroscopic description

    Spores: shape amygdaloid; colour through microscope brown; guttulate no; papillate weak; Spore Code: O3; P1; P2; D2; D3.

    Basidia: 24.2–29.6 x 7.4–9.3 μm; ave. Q = 3.3; basidia spore nature not recorded.

    Cheilocystidia: main shape clavate-stipitate, clavate-lageniform or clavate-ventricose; special features septa, sinuate; Cheilocystidia Ratios: A/M = 1.89; A/B = 1.37; B/M = 1.45.

    Pleurocystidia: no.

    Ixocutis: epicutis thickness (measured from exsiccata) 250 μm; ixocutis maximum hyphae width 6 μm; ixocutis hyphae encrustation no; shape of trama elements beneath subcutis thickly sausage-shaped.

    Caulocystidia: analysis not yet complete.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(9.6) 9.8–12.8 (13.5)
    Width (µm)(5.1) 5.4–6.5 (6.8)
    Q(1.49) 1.61–2.11 (2.28)1.871.860.16

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length(34) 36–6246468.12
    Apex Width(5.3) 6.2–8.8 (9.3)
    Median Width(2.4) 3.1–5.3 (5.9)
    Basal Width(3.5) 3.7–8.4 (10.6)
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1986)20.59 °C11.26 °C71.16 mm
    Collection month (10/1986)23.58 °C13.15 °C45.28 mm
    Max month (1986)30.67 °C20.33 °C190.86 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 66.0 60.60 2nd/5
Average length 11.2 10.64 1st/5
Average width 6.0 5.92 1st–2nd/5
Standard deviation of length 0.92 0.68 1st/5
Standard deviation of width 0.39 0.38 3rd/5
Median length 11.1 10.58 1st/5
Median width 6.0 5.96 2nd/5
Minimum length 9.6 9.16 1st–2nd/5
Minimum width 5.1 5.02 2nd/5
Low length 9.8 9.54 1st–2nd/5
Low width 5.4 5.34 2nd/5
High length 12.8 11.80 1st/5
High width 6.5 6.46 2nd/5
Max length 13.5 12.40 1st/5
Max width 6.8 6.74 2nd/5
Spore featureValueCommonalities
Ornamentation O3 100% of collections
Perispore loosening P1; P2 75% of collections; 75% of collections
Dextrinoidity D2; D3 50% of collections; 100% of collections