Collection 1000343 (herbarium acc. no. BRI AQ669300) is the holotype of Hebeloma youngii.


  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000343 was collected by P.I. Forster, R. Booth, A.M. Young (PIF26822), det: B.J. Rees on 19th February 2001 in Near Moomin, Atherton to Herberton Road, Queensland, AUSTRALIA (approx. 17.3642°S, 145.3967°E, altitude approximately 920 m above sea level - Google maps). The ectomycorrhizal family Myrtaceae (genus Eucalyptus) was present.

    The surrounding habitat was described as subtropical woodland with a substrate of cadaveric soil, corresponding to the IUCN habitat We map from the collector's description of the habitat to the International Union for Conservation of Nature (IUCN)'s definition using a standardised set of rules. Please see this page for a full list of IUCN habitats. 1.5: Forest – Subtropical/tropical dry.

    According to the GPS data the collection was in the Queensland tropical rain 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: Tropical & Subtropical Moist Broadleaf Forests) and Koppen climate code Cwa (Temperate, dry winter, hot summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: yes.

    Pileus: 20–45 mm diameter; shape umbonate; margin characters not recorded; viscosity tacky when moist; spotting not recorded; hygrophanous not recorded; colour variation two-colour; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil not recorded.

    Lamellae: attachment adnate; maximum depth not recorded; number of complete lamellae 56; tears not recorded; white fimbriate edge absent.

    Stipe: 30–60 x 3–6 {median} x 4–6 {basal} mm; stipe Q 10.0; base not recorded; floccosity fibrillose, velute; rooting not recorded; mycelial chords not recorded.

    Context: texture firm; stipe interior hollow; stipe flesh discolouring from base not recorded; slenderness measure 14.2; smell not recorded; taste not recorded.

    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 weak; papillate no; Spore Code: O2; O3; P2; P3; D3.

    Basidia: 24.9–28.3 x 6.9–7.8 μm; ave. Q = 3.7; basidia spore nature not recorded.

    Cheilocystidia: main shape lageniform, lanceolate, ventricose; special features rostrate; Cheilocystidia Ratios: A/M = 0.81; A/B = 0.36; B/M = 2.31.

    Pleurocystidia: yes.

    Ixocutis: analysis not yet complete.

    Caulocystidia: caulocystidia maximum length 35 μm.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(9.2) 10.1–11.2 (11.6)10.610.60.420
    Width (µm)(5.8) 6.0–6.9 (7.0)
    Q(1.51) 1.53–1.80 (1.85)1.631.610.08

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length32–44 (46)37385.31
    Apex Width2.6–3.3 (3.4)
    Median Width(2.8) 2.9–4.4 (4.6)
    Basal Width(7.1) 7.2–
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (2001)25.32 °C14.23 °C100.22 mm
    Collection month (2/2001)25.63 °C17.99 °C502.52 mm
    Max month (2001)29.70 °C18.18 °C502.52 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 54.0 100.00 2nd/2
Average length 10.6 10.40 1st/2
Average width 6.5 6.40 1st/2
Standard deviation of length 0.42 0.57 2nd/2
Standard deviation of width 0.27 0.28 2nd/2
Median length 10.6 10.40 1st/2
Median width 6.6 6.45 1st/2
Minimum length 9.2 8.90 1st/2
Minimum width 5.8 5.65 1st/2
Low length 10.1 9.60 1st/2
Low width 6.0 5.90 1st/2
High length 11.2 11.25 2nd/2
High width 6.9 6.80 1st/2
Max length 11.6 12.05 2nd/2
Max width 7.0 6.95 1st/2
Spore featureValueCommonalities
Ornamentation O2; O3 100% of collections; 100% of collections
Perispore loosening P2; P3 100% of collections; 50% of collections
Dextrinoidity D3 100% of collections