Taxonomy
Collection 1000033 (herbarium acc. no. MICH 10811) is the holotype of Hebeloma sporadicum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000033 was collected by A.H. Smith (55050) on 7th October 1936 in Saginaw Forest, Ann Arbor, Michigan, UNITED STATES (approx. 42.27°N, 83.8°W, altitude approximately 280 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Picea) was present.
The surrounding habitat was described as not recorded.
According to the GPS data the collection was in the Southern Great Lakes 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 Dfa (Cold, no dry season, hot summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 50–130 mm diameter; shape convex; margin characters involute, reflexed, wavy; viscosity tacky when moist; spotting yes; hygrophanous no; colour variation unicolor; with colour at centre pinkish buff; and colour at margin not recorded; with remains of universal veil not recorded.
Lamellae: attachment adnexed; maximum depth up to 12 mm; number of complete lamellae 90; tears visible with naked eye; white fimbriate edge present.
Stipe: 40–100 x 10–20 {median} x 10–20 {basal} mm; stipe Q 4.0; base cylindrical; floccosity floccose, pruinose at apex; rooting no; mycelial chords no.
Context: texture firm; stipe interior stuffed; stipe flesh discolouring from base no; slenderness measure 3.2; smell none; taste none.
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 weak; Spore Code: O3; O4; P2; P3; D0; D1.
Basidia: 26.1–36.8 x 8.2–9.8 μm; ave. Q = 3.5; basidia spore nature not recorded.
Cheilocystidia: main shape capitate-stipitate, clavate-stipitate, clavate-lageniform or clavate-ventricose; special features apical thickening, conglutinate, many collapsed in exsiccata; Cheilocystidia Ratios: A/M = 1.88; A/B = 2.17; B/M = 0.89.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 100 μm; ixocutis maximum hyphae width 7 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis not recorded up to 11 μm wide.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (10.3) 10.8–12.7 (12.9) 11.8 11.7 0.580 Width (µm) (5.2) 5.6–6.6 (6.7) 6.1 6.2 0.340 Q (1.70) 1.74–2.11 (2.18) 1.92 1.91 0.12 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (44) 50–82 (90) 61 57 11.04 Apex Width (6.3) 6.6–10.2 (11.4) 8.2 8.1 1.040 Median Width (3.7) 3.8–5.3 4.5 4.4 0.49 Basal Width (2.5) 3.2–5.0 (5.1) 4.0 4.0 0.62
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1936) --- °C --- °C --- mm Collection month (10/1936) --- °C --- °C --- mm Max month (1936) --- °C --- °C --- 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 | 70.70 | 7th/10 |
| Average length | 11.8 | 11.35 | 2nd/10 |
| Average width | 6.1 | 6.50 | 9th–10th/10 |
| Standard deviation of length | 0.58 | 0.66 | 6th–8th/10 |
| Standard deviation of width | 0.34 | 0.36 | 5th/10 |
| Median length | 11.7 | 11.29 | 3rd/10 |
| Median width | 6.2 | 6.49 | 8th–9th/10 |
| Minimum length | 10.3 | 10.02 | 2nd–3rd/10 |
| Minimum width | 5.2 | 5.57 | 9th/10 |
| Low length | 10.8 | 10.41 | 1st/10 |
| Low width | 5.6 | 6.00 | 9th–10th/10 |
| High length | 12.7 | 12.39 | 3rd–4th/10 |
| High width | 6.6 | 7.02 | 9th/10 |
| Max length | 12.9 | 13.05 | 6th–7th/10 |
| Max width | 6.7 | 7.44 | 9th/10 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O3; O4 | 100% of collections; 50% of collections |
| Perispore loosening | P2; P3 | 100% of collections; 20% of collections |
| Dextrinoidity | D0; D1 | 30% of collections; 100% of collections |