Taxonomy
Collection 1000328 (herbarium acc. no. DBG-F-007959) is Hebeloma praeolidum. It is the holotype of heterotypic synonym Hebeloma boulderense A.H. Sm., V.S. Evenson & Mitchel (1983).Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000328 was collected by V.S. Evenson on 19th August 1979 in Boulder County, Roosevelt National Forest, Elk Valley, west of Hessie, Colorado, UNITED STATES (approx. 39.9644°N, 105.6053°W, altitude approximately 2800 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genera Abies and Picea) was present.
The surrounding habitat was described as subalpine 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. 1.1: Forest – Boreal.
According to the GPS data the collection was in the Colorado Rockies 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 Conifer Forests) and Koppen climate code Dfc (Cold, no dry season, cold summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: yes.
Pileus: 20–30 mm diameter; shape convex; margin characters smooth; viscosity tacky when moist; spotting not recorded; hygrophanous no; colour variation two-colour; with colour at centre yellowish brown; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment adnate; maximum depth not recorded; number of complete lamellae 40; tears visible with x10 lens; white fimbriate edge present.
Stipe: 30–40 x 3–4 {median} x 3–4 {basal} mm; stipe Q 10.0; base cylindrical; floccosity pruinose, pruinose at apex; rooting no; mycelial chords no.
Context: texture firm; stipe interior not recorded; stipe flesh discolouring from base yes; slenderness measure 14.2; smell fruit; 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: O2; P0; D2.
Basidia: 30.6–35.1 x 6.6–9.0 μm; ave. Q = 4.2; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features basal thickening, many collapsed in exsiccata, septa; Cheilocystidia Ratios: A/M = 1.04; A/B = 0.52; B/M = 2.15.
Pleurocystidia: no.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (10.3) 11.0–13.1 (14.1) 12.1 12.1 0.760 Width (µm) (6.5) 6.6–7.5 (7.7) 7.0 6.9 0.280 Q (1.46) 1.59–1.88 (1.99) 1.73 1.73 0.1 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length 43–63 (67) 51 50 6.87 Apex Width (4.3) 4.4–6.6 (7.2) 5.3 5.1 0.830 Median Width (3.8) 3.9–6.2 (6.6) 5.2 5.3 0.76 Basal Width (6.9) 7.7–14.8 (15.0) 10.8 10.1 2.43
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1979) 9.35 °C -5.57 °C 50.19 mm Collection month (8/1979) 19.27 °C 3.82 °C 83.46 mm Max month (1979) 22.22 °C 4.73 °C 84.98 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 | 49.0 | 65.43 | 19th/21 |
| Average length | 12.1 | 11.73 | 4th–7th/21 |
| Average width | 7.0 | 6.57 | 2nd–4th/21 |
| Standard deviation of length | 0.76 | 0.78 | 11th/21 |
| Standard deviation of width | 0.28 | 0.40 | 17th–19th/21 |
| Median length | 12.1 | 11.70 | 4th–6th/21 |
| Median width | 6.9 | 6.55 | 5th–7th/21 |
| Minimum length | 10.3 | 10.18 | 5th/21 |
| Minimum width | 6.5 | 5.72 | 1st–2nd/21 |
| Low length | 11.0 | 10.51 | 4th–5th/21 |
| Low width | 6.6 | 5.98 | 1st/21 |
| High length | 13.1 | 13.02 | 9th–11th/21 |
| High width | 7.5 | 7.20 | 2nd–5th/21 |
| Max length | 14.1 | 13.54 | 5th–6th/21 |
| Max width | 7.7 | 7.60 | 7th/21 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O2 | 100% of collections |
| Perispore loosening | P0 | 80% of collections |
| Dextrinoidity | D2 | 95% of collections |