Taxonomy
Collection 17893 (herbarium acc. no. DENA-61420) is Hebeloma eburneum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 17893 was collected by H.J. Beker, L. Davies on 18th August 2018 in Kantishna Roadhouse Nature Trail, Denali National Park, Alaska, UNITED STATES (63.5246°N, 150.9624°W, altitude approximately 490 m above sea level - Google maps). The ectomycorrhizal families Betulaceae (genera Alnus and Betula) and Pinaceae (genus Picea) were present.
The surrounding habitat was described as boreal, mixed but mainly coniferous woodland pathside with a substrate of soil and litter, 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. 1.1: Forest – Boreal.
According to the GPS data the collection was in the Alaska-St. Elias Range 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: Tundra) and Koppen climate code Dfc (Cold, no dry season, cold summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: up to 36 mm diameter; shape umbonate strongly; margin characters smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation unicolor; with colour at centre cream; and colour at margin pale cream; with remains of universal veil no.
Lamellae: attachment emarginate; maximum depth up to 4 mm; number of complete lamellae 72; tears visible with x10 lens; white fimbriate edge present.
Stipe: 43 x 10 {median} x 17 {basal} mm; stipe Q 4.3; base clavate; floccosity not recorded; rooting no; mycelial chords yes.
Context: texture firm; stipe interior stuffed; stipe flesh discolouring from base no; slenderness measure 5.1; smell raphanoid; taste not recorded.
Spore deposit colour: analysis not yet complete.
Exsiccata: analysis not yet complete.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid; colour through microscope not recorded; guttulate not recorded; papillate no; Spore Code: O3; P1; D0; D1.
Basidia: 25.7–34.8 x 8.1–8.8 μm; ave. Q = 3.6; basidia spore nature not recorded.
Cheilocystidia: main shape capitate-stipitate, clavate-stipitate, spathulate-stipitate; special features apical thickening, septa; Cheilocystidia Ratios: A/M = 2.61; A/B = 2.82; B/M = 1.01.
Pleurocystidia: no.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (8.8) 9.0–12.0 (12.4) 10.6 11.0 1.050 Width (µm) (5.4) 5.8–6.8 (7.4) 6.3 6.4 0.410 Q (1.41) 1.50–1.87 (1.89) 1.68 1.70 0.13 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (51) 55–73 (85) 63 61 7.6 Apex Width (7.2) 7.5–10.4 (13.2) 9.0 9.0 1.320 Median Width (2.5) 2.8–4.6 (4.9) 3.5 3.5 0.6 Basal Width 2.0–4.8 (5.5) 3.5 3.4 1.01
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (2018) 2.97 °C -5.92 °C 48.51 mm Collection month (8/2018) 13.24 °C 6.24 °C 138.55 mm Max month (2018) 19.14 °C 7.54 °C 138.55 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 | 20.0 | 51.46 | 80th–81st/90 |
| Average length | 10.6 | 11.78 | 90th/92 |
| Average width | 6.3 | 6.54 | 66th–75th/92 |
| Standard deviation of length | 1.05 | 0.74 | 2nd/90 |
| Standard deviation of width | 0.41 | 0.37 | 28th–35th/90 |
| Median length | 11.0 | 11.80 | 78th–81st/90 |
| Median width | 6.4 | 6.54 | 54th–64th/90 |
| Minimum length | 8.8 | 10.23 | 90th/92 |
| Minimum width | 5.4 | 5.78 | 85th–89th/92 |
| Low length | 9.0 | 10.67 | 91st/92 |
| Low width | 5.8 | 5.99 | 58th–73rd/92 |
| High length | 12.0 | 12.89 | 78th–81st/92 |
| High width | 6.8 | 7.12 | 66th–76th/92 |
| Max length | 12.4 | 13.47 | 79th–80th/92 |
| Max width | 7.4 | 7.43 | 45th–52nd/92 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O3 | 88% of collections |
| Perispore loosening | P1 | 93% of collections |
| Dextrinoidity | D0; D1 | 17% of collections; 81% of collections |