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Taxonomy

Collection 1000443 (herbarium acc. no. TENN-F-021622) is the holotype of Hebeloma nitidum.

Description

  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000443 was collected by L.R. Hesler (LRH21622) on 2nd January 1955 in Knoxville, Hardin Valley Rd., Tennessee, UNITED STATES (approx. 35.9189°N, 84.2161°W, altitude approximately 260 m above sea level - Google maps). No ectomycorrhizal plants were recorded.

    The surrounding habitat was described as not recorded.

    According to the GPS data the collection was in the Appalachian-Blue Ridge 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 Cfa (Temperate, no dry season, hot summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: yes.

    Pileus: 25–70 mm diameter; shape convex; margin characters smooth, wavy; viscosity tacky when moist; spotting no; hygrophanous no; colour variation unicolor; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil not recorded.

    Lamellae: attachment emarginate; maximum depth not recorded; number of complete lamellae 62; tears absent; white fimbriate edge present.

    Stipe: 40–70 x 6–15 {median} x 6–15 {basal} mm; stipe Q 4.7–6.7; base cylindrical; floccosity fibrillose, pruinose at apex; rooting not recorded; mycelial chords not recorded.

    Context: texture firm; stipe interior hollow, stuffed; stipe flesh discolouring from base not recorded; slenderness measure 7.7; smell not recorded; taste bitter 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 yes; Spore Code: O3; O4; P2; P3; D3; D4.

    Basidia: 30.3–44.0 x 6.7–8.0 μm; ave. Q = 4.8; basidia spore nature not recorded.

    Cheilocystidia: main shape cylindrical, clavate-lageniform or clavate-ventricose, ventricose; special features branching, irregular, rostrate, septa; Cheilocystidia Ratios: A/M = 1.19; A/B = 1.01; B/M = 1.21.

    Pleurocystidia: no.

    Ixocutis: analysis not yet complete.

    Caulocystidia: analysis not yet complete.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(8.3) 9.2–11.1 (11.4)10.210.30.610
    Width (µm)(5.3) 5.5–6.6 (6.8)6.16.20.350
    Q(1.51) 1.55–1.80 (1.97)1.661.650.09

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length(18) 20–49 (60)312910.61
    Apex Width(2.7) 3.0–5.5 (6.3)4.24.30.710
    Median Width(2.3) 3.2–5.1 (5.9)3.83.70.81
    Basal Width(2.6) 3.2–5.7 (6.0)4.54.60.84
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1955)--- °C--- °C--- mm
    Collection month (1/1955)--- °C--- °C--- mm
    Max month (1955)--- °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 79.0 67.14 5th/14
Average length 10.2 9.86 2nd/14
Average width 6.1 5.96 1st–4th/14
Standard deviation of length 0.61 0.53 3rd/14
Standard deviation of width 0.35 0.29 2nd/14
Median length 10.3 9.89 1st–2nd/14
Median width 6.2 5.99 1st–3rd/14
Minimum length 8.3 8.56 13th/14
Minimum width 5.3 5.26 6th/14
Low length 9.2 8.99 2nd/14
Low width 5.5 5.47 6th–9th/14
High length 11.1 10.69 2nd/14
High width 6.6 6.41 1st–3rd/14
Max length 11.4 10.89 2nd/14
Max width 6.8 6.53 2nd/14
Spore featureValueCommonalities
Ornamentation O3; O4 100% of collections; 100% of collections
Perispore loosening P2; P3 28% of collections; 85% of collections
Dextrinoidity D3; D4 78% of collections; 78% of collections