Taxonomy
Collection 1000246 (herbarium acc. no. L0053546) is the holotype of Hebeloma erebium.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000246 was collected by H.S.C. Huijsman (H72-80) on 12th July 1972 in Island of Voorne, Rockanj "Quackjeswater", Zuid-Holland, NETHERLANDS (approx. 51.87°N, 4.0651°E, altitude approximately 0 m above sea level - Google maps). The ectomycorrhizal families Betulaceae (genus Betula) and Salicaceae (genus Salix) were present.
The surrounding habitat was described as coastal dune with a substrate of boggy, sandy 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. 13.3: Coastal Sand Dunes.
According to the GPS data the collection was in the European Atlantic mixed 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 Cfb (Temperate, no dry season, warm summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 30–70 mm diameter; shape convex, umbonate; margin characters not recorded; viscosity tacky when moist; spotting not recorded; hygrophanous yes; colour variation unicolor; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil not recorded.
Lamellae: attachment adnate, decurrent tooth; maximum depth up to 5 mm; number of complete lamellae 60; tears not recorded; white fimbriate edge weak.
Stipe: 50–85 x 4–8 {median} x 5–9 {basal} mm; stipe Q 10.6–12.5; base clavate; floccosity pruinose at apex; rooting not recorded; mycelial chords not recorded.
Context: texture firm; stipe interior hollow, superior wick; stipe flesh discolouring from base yes; slenderness measure 16.9; smell none; taste none.
Spore deposit colour: analysis not yet complete.
Exsiccata: lamellae blackening.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid, limoniform; colour through microscope yellow; guttulate no; papillate yes; Spore Code: O3; P2; D2; D3.
Basidia: 29.4–34.1 x 8.1–10.8 μm; ave. Q = 3.5; basidia spore nature not recorded.
Cheilocystidia: main shape clavate, clavate-lageniform or clavate-ventricose, lageniform, ventricose; special features apical thickening, geniculate, median thickening, yellow contents; Cheilocystidia Ratios: A/M = 1.51; A/B = 1.11; B/M = 1.43.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 80 μm; ixocutis maximum hyphae width 5 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis thickly sausage-shaped.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (8.8) 9.2–11.9 (12.8) 10.5 10.4 0.810 Width (µm) (5.2) 5.6–6.8 6.1 6.1 0.390 Q (1.42) 1.54–2.02 (2.13) 1.72 1.71 0.14 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (32) 33–53 (66) 42 40 7.53 Apex Width (5.0) 5.4–8.8 (10.2) 7.1 7.0 1.070 Median Width (3.4) 4.0–6.1 (6.6) 5.0 5.0 0.71 Basal Width (3.8) 5.0–9.1 (9.7) 7.0 7.1 1.32
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1972) 12.28 °C 6.45 °C 56.10 mm Collection month (7/1972) 20.19 °C 13.85 °C 95.69 mm Max month (1972) 20.19 °C 13.85 °C 95.69 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 | 55.0 | 36.47 | 4th–5th/15 |
| Average length | 10.5 | 11.84 | 15th/15 |
| Average width | 6.1 | 6.76 | 15th/15 |
| Standard deviation of length | 0.81 | 0.73 | 5th–6th/15 |
| Standard deviation of width | 0.39 | 0.38 | 8th–9th/15 |
| Median length | 10.4 | 11.85 | 15th/15 |
| Median width | 6.1 | 6.76 | 15th/15 |
| Minimum length | 8.8 | 10.42 | 15th/15 |
| Minimum width | 5.2 | 5.99 | 15th/15 |
| Low length | 9.2 | 10.75 | 15th/15 |
| Low width | 5.6 | 6.19 | 15th/15 |
| High length | 11.9 | 12.96 | 14th/15 |
| High width | 6.8 | 7.35 | 14th–15th/15 |
| Max length | 12.8 | 13.33 | 10th–11th/15 |
| Max width | 6.8 | 7.52 | 15th/15 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O3 | 80% of collections |
| Perispore loosening | P2 | 33% of collections |
| Dextrinoidity | D2; D3 | 26% of collections; 100% of collections |