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Taxonomy

Collection 16673 (herbarium acc. no. C-F-103555) is Hebeloma arcticum.

Description

  • arrow_drop_downarrow_drop_upCollecting details

    Collection 16673 was collected by T. Borgen (90.083) on 4th September 1990 in Paamiut/Frederikshåb, S, GREENLAND (approx. 62.01°N, 49.4°W, altitude approximately 10 m above sea level - Google maps). The ectomycorrhizal family Salicaceae (genus Salix) was present.

    The surrounding habitat was described as arctic fenland with a substrate of boggy, grassy 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. 5.10: Wetlands (inland) – Tundra wetlands (inc. pools and temporary waters from snowmelt).

    According to the GPS data the collection was in the Koppen climate code ET (Polar, tundra).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: no.

    Pileus: 20–29 mm diameter; shape umbonate weakly; margin characters eroded; viscosity tacky when moist; spotting no; hygrophanous no; colour variation two-colour; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil no.

    Lamellae: attachment not recorded; maximum depth up to 3 mm; number of complete lamellae 39; tears visible with x10 lens; white fimbriate edge weak.

    Stipe: 40–50 x 5–6 {median} x 6–8 {basal} mm; stipe Q 7.7–8.0; base clavate, cylindrical; floccosity not recorded; rooting no; mycelial chords no.

    Context: texture firm; stipe interior hollow; stipe flesh discolouring from base yes; slenderness measure 14.6; smell earthy; taste mild.

    Spore deposit colour: analysis not yet complete.

    Exsiccata: normal.

  • arrow_drop_downarrow_drop_upMicroscopic description

    Spores: shape amygdaloid, ellipsoid, ovoid; colour through microscope not recorded; guttulate not recorded; papillate no; Spore Code: O1; P0; D2; D3.

    Basidia: 23.9–33.8 x 7.8–9.6 μm; ave. Q = 3.5; basidia spore nature not recorded.

    Cheilocystidia: main shape gently clavate, clavate-stipitate, clavate-lageniform or clavate-ventricose; special features not recorded; Cheilocystidia Ratios: A/M = 2.06; A/B = 1.81; 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)(9.7) 10.1–12.5 (13.1)11.111.10.810
    Width (µm)(5.5) 5.8–6.8 (7.1)6.46.40.340
    Q(1.59) 1.61–1.88 (1.89)1.751.760.08

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length(39) 40–66 (67)50489.19
    Apex Width(5.6) 5.8–9.57.57.11.480
    Median Width2.5–5.4 (5.5)3.94.01.16
    Basal Width(2.6) 2.8–5.94.44.11.14
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1990)1.56 °C-4.32 °C83.40 mm
    Collection month (9/1990)5.44 °C0.57 °C149.03 mm
    Max month (1990)13.19 °C5.30 °C149.03 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 30.0 54.73 9th/11
Average length 11.1 11.40 8th/11
Average width 6.4 6.60 10th–11th/11
Standard deviation of length 0.81 0.78 6th/11
Standard deviation of width 0.34 0.40 9th/11
Median length 11.1 11.44 7th–8th/11
Median width 6.4 6.62 10th–11th/11
Minimum length 9.7 9.69 6th–7th/11
Minimum width 5.5 5.69 6th–7th/11
Low length 10.1 10.13 5th–6th/11
Low width 5.8 5.97 8th/11
High length 12.5 12.62 7th/11
High width 6.8 7.23 11th/11
Max length 13.1 13.05 6th/11
Max width 7.1 7.46 10th–11th/11
Spore featureValueCommonalities
Ornamentation O1 100% of collections
Perispore loosening P0 100% of collections
Dextrinoidity D2; D3 72% of collections; 81% of collections