Taxonomy
Collection 1000330 (herbarium acc. no. TENN-F-029408) is Hebeloma albidulum. It is the holotype of heterotypic synonym Hebeloma brunneifolium Hesler (1977).Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000330 was collected by L.R. Hesler on 30th September 1966 in Blount, Townsend, Cades Cove, Tennessee, UNITED STATES (approx. 35.6019°N, 83.8114°W, altitude approximately 575 m above sea level - Google maps). No ectomycorrhizal plants were recorded.
The surrounding habitat was described as deciduous woodland, 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. 1.4: Forest – Temperate.
According to the GPS data the collection was in the Appalachian-Blue Ridge 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 Cfa (Temperate, no dry season, hot summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 25–40 mm diameter; shape convex, umbonate; margin characters fibrillose, smooth; viscosity tacky when moist; spotting no; hygrophanous not recorded; colour variation two-colour; with colour at centre clay-buff; and colour at margin cinnamon; with remains of universal veil not recorded.
Lamellae: attachment adnexed, emarginate; maximum depth not recorded; number of complete lamellae 60; tears absent; white fimbriate edge very strong.
Stipe: 40–70 x 4–6 {median} x 9–12 {basal} mm; stipe Q 10.0–11.7; base bulbous, cylindrical; floccosity fibrillose, pruinose at apex; rooting no; mycelial chords yes.
Context: texture firm; stipe interior not recorded; stipe flesh discolouring from base no; slenderness measure 18.2; smell raphanoid; taste raphanoid.
Spore deposit colour: analysis not yet complete.
Exsiccata: hard, lamellae blackening.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid, limoniform; colour through microscope brown; guttulate no; papillate yes; Spore Code: O3; O4; P2; P3; D3; D4.
Basidia: 24.0–31.1 x 5.2–8.0 μm; ave. Q = 3.8; basidia spore nature not recorded.
Cheilocystidia: main shape gently clavate, clavate-lageniform or clavate-ventricose, lageniform, ventricose; special features not recorded; Cheilocystidia Ratios: A/M = 1.41; A/B = 1.17; B/M = 1.33.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 120 μm; ixocutis maximum hyphae width 7 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis not recorded.
Caulocystidia: caulocystidia maximum length 150 μm.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (9.6) 9.7–12.0 (13.0) 11.0 11.0 0.700 Width (µm) (5.6) 5.8–7.3 (7.5) 6.6 6.7 0.470 Q (1.40) 1.43–1.97 (2.25) 1.66 1.64 0.17 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (30) 34–59 (72) 44 43 9.7 Apex Width (4.5) 5.0–8.3 (10.7) 6.3 5.9 1.170 Median Width (3.4) 3.9–5.7 (6.0) 4.6 4.3 0.66 Basal Width (3.0) 3.4–8.1 (10.0) 6.0 6.1 1.62
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1966) 17.03 °C 4.51 °C 132.08 mm Collection month (9/1966) 22.76 °C 11.25 °C 106.86 mm Max month (1966) 27.79 °C 15.08 °C 192.18 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 | 64.0 | 74.28 | 15th/25 |
| Average length | 11.0 | 11.06 | 15th–17th/25 |
| Average width | 6.6 | 6.84 | 21st/25 |
| Standard deviation of length | 0.7 | 0.65 | 8th–9th/25 |
| Standard deviation of width | 0.47 | 0.39 | 6th/25 |
| Median length | 11.0 | 11.10 | 17th/25 |
| Median width | 6.7 | 6.85 | 17th–19th/25 |
| Minimum length | 9.6 | 9.50 | 8th/25 |
| Minimum width | 5.6 | 5.87 | 21st–23rd/25 |
| Low length | 9.7 | 10.02 | 20th/25 |
| Low width | 5.8 | 6.22 | 23rd/25 |
| High length | 12.0 | 12.12 | 18th/25 |
| High width | 7.3 | 7.47 | 18th–19th/25 |
| Max length | 13.0 | 12.62 | 3rd–7th/25 |
| Max width | 7.5 | 7.76 | 20th–21st/25 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O3; O4 | 96% of collections; 80% of collections |
| Perispore loosening | P2; P3 | 48% of collections; 100% of collections |
| Dextrinoidity | D3; D4 | 88% of collections; 84% of collections |