Taxonomy
Collection 1000409 (herbarium acc. no. MICH 10755) is Hebeloma sordidulum. It is the holotype of heterotypic synonym Hebeloma juneauense A.H. Sm., V.S. Evenson & Mitchel (1983).Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000409 was collected by V. Wells, P. Kempton (5958), det: A.H. Smith on 8th September 1972 in Juneau, Alaska, UNITED STATES (approx. 58.3597°N, 134.5782°W, altitude approximately 10 m above sea level - Google maps). The ectomycorrhizal families Betulaceae (genus Alnus), Pinaceae (genus Picea) and Salicaceae (genus Populus) were present.
The surrounding habitat was described as not recorded with a substrate of sandy, silty soil.
According to the GPS data the collection was in the Pacific Coastal Mountain icefields and 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: 30–50 mm diameter; shape convex; margin characters fibrillose, involute, sulcate; viscosity tacky when moist; spotting yes; hygrophanous no; colour variation unicolor; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment adnate; maximum depth up to 4 mm; number of complete lamellae 72; tears visible with naked eye; white fimbriate edge weak.
Stipe: 35–50 x 6–8 {median} x 6–8 {basal} mm; stipe Q 5.8–6.3; base cylindrical; floccosity fibrillose, pruinose at apex; rooting no; mycelial chords not recorded.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base not recorded; slenderness measure 6.5; smell none; taste bitter weakly.
Spore deposit colour: analysis not yet complete.
Exsiccata: analysis not yet complete.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid, fusoid; colour through microscope yellow brown; guttulate no; papillate very strongly; Spore Code: O3; P1; P2; D2; D3.
Basidia: 24.2–32.9 x 6.6–8.3 μm; ave. Q = 3.7; basidia spore nature not recorded.
Cheilocystidia: main shape capitate-stipitate, clavate-stipitate, clavate-lageniform or clavate-ventricose, spathulate-stipitate; special features many collapsed in exsiccata, yellow contents; Cheilocystidia Ratios: A/M = 1.95; A/B = 1.27; B/M = 1.56.
Pleurocystidia: no.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (10.1) 10.2–12.1 (12.6) 11.0 10.8 0.590 Width (µm) (4.7) 5.5–6.4 (6.7) 5.8 5.8 0.340 Q (1.61) 1.70–2.18 (2.30) 1.89 1.87 0.14 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (42) 47–69 (82) 57 55 8.69 Apex Width (5.2) 5.8–10.1 (13.7) 7.7 7.4 1.640 Median Width (2.7) 2.8–4.6 (4.7) 3.9 4.0 0.59 Basal Width (4.9) 5.1–7.2 (8.3) 6.0 5.7 0.84
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1972) 6.61 °C -0.91 °C 141.88 mm Collection month (9/1972) 12.05 °C 4.50 °C 251.94 mm Max month (1972) 19.33 °C 9.23 °C 258.25 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 | 84.0 | 58.85 | 9th/47 |
| Average length | 11.0 | 11.68 | 42nd–46th/47 |
| Average width | 5.8 | 6.31 | 46th/47 |
| Standard deviation of length | 0.59 | 0.79 | 42nd/47 |
| Standard deviation of width | 0.34 | 0.37 | 28th–31st/47 |
| Median length | 10.8 | 11.67 | 45th–46th/47 |
| Median width | 5.8 | 6.32 | 46th/47 |
| Minimum length | 10.1 | 9.97 | 17th–18th/47 |
| Minimum width | 4.7 | 5.42 | 45th–46th/47 |
| Low length | 10.2 | 10.47 | 33rd–36th/47 |
| Low width | 5.5 | 5.76 | 36th–37th/47 |
| High length | 12.1 | 12.91 | 42nd/47 |
| High width | 6.4 | 6.88 | 44th–45th/47 |
| Max length | 12.6 | 13.47 | 44th–45th/47 |
| Max width | 6.7 | 7.12 | 43rd–45th/47 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O3 | 82% of collections |
| Perispore loosening | P1; P2 | 93% of collections; 27% of collections |
| Dextrinoidity | D2; D3 | 100% of collections; 48% of collections |