Taxonomy
Collection 1000128 (herbarium acc. no. C JV-91-685) is the epitype of Hebeloma pusillum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000128 was collected by J. Vesterholt (91-685) on 16th October 1991 in Langesoskovene s of Morud UTM NG7444 TBU 29, F, DENMARK (55.434°N, 10.199°E, altitude approximately 30 m above sea level - Google maps). The ectomycorrhizal family Salicaceae (genus Salix) was present.
The surrounding habitat was described as willow thicket with a substrate of boggy 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. 5.3: Wetlands (inland) – Shrub dominated wetlands.
According to the GPS data the collection was in the Baltic 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 Dfb (Cold, no dry season, warm summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: no.
Pileus: 5–23 mm diameter; shape convex, umbonate; margin characters involute, scalloped, smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation two-colour; with colour at centre cinnamon, umber, brick; and colour at margin cream; with remains of universal veil no.
Lamellae: attachment adnate, emarginate; maximum depth not recorded; number of complete lamellae 27; tears visible with naked eye; white fimbriate edge present.
Stipe: 15–40 x 1–3 {median} x 1–3 {basal} mm; stipe Q 13.3–15.0; base cylindrical; floccosity pruinose, pruinose at apex; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow, stuffed; stipe flesh discolouring from base yes; slenderness measure 34.1; smell raphanoid; taste raphanoid.
Spore deposit colour: umber.
Exsiccata: fragile.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid; colour through microscope yellow brown; guttulate not recorded; papillate no; Spore Code: O2; P0; D0; D1.
Basidia: 25.4–33.3 x 8.0–10.6 μm; ave. Q = 3.0; basidia spore nature not recorded.
Cheilocystidia: main shape capitate-stipitate, clavate, clavate-stipitate; special features flexuose, long, median thickening; Cheilocystidia Ratios: A/M = 2.71; A/B = 2.39; B/M = 1.19.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 40 μm; ixocutis maximum hyphae width 5 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis cylindrical, ellipsoid, thickly sausage-shaped up to 18 μm wide.
Caulocystidia: caulocystidia maximum length 75 μm.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (10.8) 11.1–13.7 (15.1) 12.3 12.3 0.870 Width (µm) (5.2) 5.8–7.0 (7.6) 6.4 6.4 0.480 Q (1.70) 1.79–2.11 (2.33) 1.93 1.92 0.13 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (47) 51–97 (109) 70 68 16.43 Apex Width (5.1) 6.1–12.4 (15.0) 9.0 8.7 1.960 Median Width (0.7) 3.1–6.1 (6.4) 4.3 4.2 1.2 Basal Width (2.7) 3.1–6.3 (7.5) 4.4 4.0 1.15
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1991) 11.53 °C 5.14 °C 50.16 mm Collection month (10/1991) 11.91 °C 5.65 °C 41.64 mm Max month (1991) 22.29 °C 13.46 °C 98.23 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 | 40.0 | 57.25 | 20th/20 |
| Average length | 12.3 | 12.32 | 11th/20 |
| Average width | 6.4 | 6.19 | 5th–7th/20 |
| Standard deviation of length | 0.87 | 0.84 | 5th–7th/20 |
| Standard deviation of width | 0.48 | 0.38 | 3rd/20 |
| Median length | 12.3 | 12.31 | 11th/20 |
| Median width | 6.4 | 6.20 | 6th–7th/20 |
| Minimum length | 10.8 | 10.27 | 7th/20 |
| Minimum width | 5.2 | 5.34 | 10th–14th/20 |
| Low length | 11.1 | 11.05 | 11th/20 |
| Low width | 5.8 | 5.59 | 5th–6th/20 |
| High length | 13.7 | 13.64 | 10th/20 |
| High width | 7.0 | 6.76 | 5th–7th/20 |
| Max length | 15.1 | 14.56 | 4th–6th/20 |
| Max width | 7.6 | 7.12 | 4th–5th/20 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O2 | 70% of collections |
| Perispore loosening | P0 | 20% of collections |
| Dextrinoidity | D0; D1 | 30% of collections; 90% of collections |