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Taxonomy

Collection 1000033 (herbarium acc. no. MICH 10811) is the holotype of Hebeloma sporadicum.

Description

  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000033 was collected by A.H. Smith (55050) on 7th October 1936 in Saginaw Forest, Ann Arbor, Michigan, UNITED STATES (approx. 42.27°N, 83.8°W, altitude approximately 280 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Picea) was present.

    The surrounding habitat was described as not recorded.

    According to the GPS data the collection was in the Southern Great Lakes 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 Dfa (Cold, no dry season, hot summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: no.

    Pileus: 50–130 mm diameter; shape convex; margin characters involute, reflexed, wavy; viscosity tacky when moist; spotting yes; hygrophanous no; colour variation unicolor; with colour at centre pinkish buff; and colour at margin not recorded; with remains of universal veil not recorded.

    Lamellae: attachment adnexed; maximum depth up to 12 mm; number of complete lamellae 90; tears visible with naked eye; white fimbriate edge present.

    Stipe: 40–100 x 10–20 {median} x 10–20 {basal} mm; stipe Q 4.0; base cylindrical; floccosity floccose, pruinose at apex; rooting no; mycelial chords no.

    Context: texture firm; stipe interior stuffed; stipe flesh discolouring from base no; slenderness measure 3.2; smell none; taste none.

    Spore deposit colour: analysis not yet complete.

    Exsiccata: analysis not yet complete.

  • arrow_drop_downarrow_drop_upMicroscopic description

    Spores: shape amygdaloid; colour through microscope not recorded; guttulate not recorded; papillate weak; Spore Code: O3; O4; P2; P3; D0; D1.

    Basidia: 26.1–36.8 x 8.2–9.8 μm; ave. Q = 3.5; basidia spore nature not recorded.

    Cheilocystidia: main shape capitate-stipitate, clavate-stipitate, clavate-lageniform or clavate-ventricose; special features apical thickening, conglutinate, many collapsed in exsiccata; Cheilocystidia Ratios: A/M = 1.88; A/B = 2.17; B/M = 0.89.

    Pleurocystidia: no.

    Ixocutis: epicutis thickness (measured from exsiccata) 100 μm; ixocutis maximum hyphae width 7 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis not recorded up to 11 μm wide.

    Caulocystidia: analysis not yet complete.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(10.3) 10.8–12.7 (12.9)11.811.70.580
    Width (µm)(5.2) 5.6–6.6 (6.7)6.16.20.340
    Q(1.70) 1.74–2.11 (2.18)1.921.910.12

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length(44) 50–82 (90)615711.04
    Apex Width(6.3) 6.6–10.2 (11.4)8.28.11.040
    Median Width(3.7) 3.8–5.34.54.40.49
    Basal Width(2.5) 3.2–5.0 (5.1)4.04.00.62
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1936)--- °C--- °C--- mm
    Collection month (10/1936)--- °C--- °C--- mm
    Max month (1936)--- °C--- °C--- 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 55.0 70.70 7th/10
Average length 11.8 11.35 2nd/10
Average width 6.1 6.50 9th–10th/10
Standard deviation of length 0.58 0.66 6th–8th/10
Standard deviation of width 0.34 0.36 5th/10
Median length 11.7 11.29 3rd/10
Median width 6.2 6.49 8th–9th/10
Minimum length 10.3 10.02 2nd–3rd/10
Minimum width 5.2 5.57 9th/10
Low length 10.8 10.41 1st/10
Low width 5.6 6.00 9th–10th/10
High length 12.7 12.39 3rd–4th/10
High width 6.6 7.02 9th/10
Max length 12.9 13.05 6th–7th/10
Max width 6.7 7.44 9th/10
Spore featureValueCommonalities
Ornamentation O3; O4 100% of collections; 50% of collections
Perispore loosening P2; P3 100% of collections; 20% of collections
Dextrinoidity D0; D1 30% of collections; 100% of collections