Taxonomy
Collection 11034 (herbarium acc. no. BR 5020184116583) is the holotype of Hebeloma islandicum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 11034 was collected by H.J. Beker, M.L. Beker, det: H.J. Beker on 28th July 2005 in West Fjords, ICELAND (65.7433°N, 23.1563°W, altitude approximately 295 m above sea level - Google maps). The ectomycorrhizal family Salicaceae (genus Salix) was present.
The surrounding habitat was described as arctic shrubland with a substrate of bare, calcareous 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. 4.1: Grassland – Tundra.
According to the GPS data the collection was in the Iceland boreal birch forests and alpine tundra 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: Boreal Forests/Taiga) and Koppen climate code ET (Polar, tundra).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 20–27 mm diameter; shape convex; margin characters smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation two-colour; with colour at centre yellowish brown; and colour at margin pale cream, cream; with remains of universal veil no.
Lamellae: attachment emarginate; maximum depth up to 5 mm; number of complete lamellae 43; tears visible with naked eye; white fimbriate edge present.
Stipe: 17–22 x 4–5 {median} x 6–7 {basal} mm; stipe Q 3.4–5.5; base clavate; floccosity floccose; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base yes; slenderness measure 4.1; smell raphanoid; taste mild.
Spore deposit colour: analysis not yet complete.
Exsiccata: normal.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid; colour through microscope yellow brown; guttulate yes; papillate yes; Spore Code: O2; P0; P1; D2; D3.
Basidia: 29.9–33.0 x 8.1–9.0 μm; ave. Q = 3.7; basidia spore nature not recorded.
Cheilocystidia: main shape clavate, clavate-stipitate, clavate-lageniform or clavate-ventricose, lageniform, ventricose; special features irregular, none; Cheilocystidia Ratios: A/M = 1.74; A/B = 1.04; B/M = 1.73.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 120 μm; ixocutis maximum hyphae width 5 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis ellipsoid, isodiametric, thickly sausage-shaped up to 20 μm wide.
Caulocystidia: caulocystidia maximum length 75 μm.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (9.8) 10.9–13.1 (13.6) 11.8 11.8 0.720 Width (µm) 6.1–7.2 (7.6) 6.6 6.6 0.310 Q (1.59) 1.65–1.92 (1.99) 1.78 1.77 0.08 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (38) 39–64 (77) 52 51 8.86 Apex Width (5.6) 6.3–8.7 (9.5) 7.4 7.4 0.740 Median Width (3.7) 4.0–5.8 (6.5) 4.7 4.6 0.6 Basal Width (5.6) 5.8–9.9 (10.2) 8.0 8.1 1.35
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (2005) 4.44 °C -0.94 °C 84.90 mm Collection month (7/2005) 11.85 °C 6.01 °C 73.65 mm Max month (2005) 11.85 °C 6.01 °C 172.22 mm
- arrow_drop_downarrow_drop_upAnalyse this collection
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 measurements | My value | Species mean value | Position |
|---|---|---|---|
| Count | 70.0 | 65.25 | 2nd/4 |
| Average length | 11.8 | 11.88 | 3rd/4 |
| Average width | 6.6 | 6.75 | 3rd/4 |
| Standard deviation of length | 0.72 | 0.75 | 3rd/4 |
| Standard deviation of width | 0.31 | 0.34 | 3rd–4th/4 |
| Median length | 11.8 | 11.85 | 3rd/4 |
| Median width | 6.6 | 6.75 | 3rd/4 |
| Minimum length | 9.8 | 9.97 | 3rd/4 |
| Minimum width | 6.1 | 5.95 | 2nd/4 |
| Low length | 10.9 | 10.62 | 2nd/4 |
| Low width | 6.1 | 6.20 | 3rd/4 |
| High length | 13.1 | 13.05 | 3rd/4 |
| High width | 7.2 | 7.30 | 3rd/4 |
| Max length | 13.6 | 13.43 | 3rd/4 |
| Max width | 7.6 | 7.65 | 3rd/4 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O2 | 100% of collections |
| Perispore loosening | P0; P1 | 50% of collections; 75% of collections |
| Dextrinoidity | D2; D3 | 75% of collections; 50% of collections |