Taxonomy
Collection 16676 (herbarium acc. no. C-F-103483) is Hebeloma arcticum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 16676 was collected by T. Borgen (90.071) on 1st September 1990 in Paamiut/Frederikshåb, at the river, 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 tundra riverside with a substrate of rich 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 Koppen climate code ET (Polar, tundra).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 22–38 mm diameter; shape convex, umbonate weakly; margin characters not recorded; viscosity tacky when moist; spotting no; hygrophanous no; colour variation not recorded; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil no.
Lamellae: attachment emarginate; maximum depth up to 4 mm; number of complete lamellae 40; tears visible with x10 lens; white fimbriate edge weak.
Stipe: 37–45 x 7–9 {median} x 7–9 {basal} mm; stipe Q 5.0–5.3; base cylindrical; floccosity velute; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base no; slenderness measure 7.4; smell raphanoid; taste mild.
Spore deposit colour: clay-buff.
Exsiccata: analysis not yet complete.
- 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: 28.5–33.6 x 7.7–9.6 μm; ave. Q = 3.7; basidia spore nature not recorded.
Cheilocystidia: main shape gently clavate, clavate-stipitate, clavate-lageniform or clavate-ventricose; special features apical thickening, median thickening; Cheilocystidia Ratios: A/M = 1.55; A/B = 1.33; B/M = 1.23.
Pleurocystidia: no.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (9.3) 9.9–12.4 (13.8) 11.2 11.0 0.880 Width (µm) (5.4) 5.7–7.1 (7.5) 6.4 6.4 0.460 Q (1.51) 1.57–1.86 (1.98) 1.74 1.76 0.09 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (39) 44–59 (64) 51 51 6.28 Apex Width (3.6) 5.2–8.5 (9.6) 7.0 6.8 1.090 Median Width (3.5) 3.6–5.4 (5.7) 4.5 4.3 0.58 Basal Width (2.8) 3.4–7.5 (7.6) 5.4 5.6 1.18
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1990) 1.56 °C -4.32 °C 83.40 mm Collection month (9/1990) 5.44 °C 0.57 °C 149.03 mm Max month (1990) 13.19 °C 5.30 °C 149.03 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 | 66.0 | 54.73 | 3rd/11 |
| Average length | 11.2 | 11.40 | 7th/11 |
| Average width | 6.4 | 6.60 | 10th–11th/11 |
| Standard deviation of length | 0.88 | 0.78 | 2nd/11 |
| Standard deviation of width | 0.46 | 0.40 | 3rd/11 |
| Median length | 11.0 | 11.44 | 9th/11 |
| Median width | 6.4 | 6.62 | 10th–11th/11 |
| Minimum length | 9.3 | 9.69 | 9th–10th/11 |
| Minimum width | 5.4 | 5.69 | 8th–10th/11 |
| Low length | 9.9 | 10.13 | 8th–9th/11 |
| Low width | 5.7 | 5.97 | 9th–10th/11 |
| High length | 12.4 | 12.62 | 8th/11 |
| High width | 7.1 | 7.23 | 8th–10th/11 |
| Max length | 13.8 | 13.05 | 1st–2nd/11 |
| Max width | 7.5 | 7.46 | 6th–8th/11 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O1 | 100% of collections |
| Perispore loosening | P0 | 100% of collections |
| Dextrinoidity | D2; D3 | 72% of collections; 81% of collections |