Taxonomy
Collection 1000466 (herbarium acc. no. MICH 10791) is the holotype of Hebeloma praeolidum.Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000466 was collected by A.H. Smith (17169) on 22nd August 1941 in Olympic Hot Springs, Olympic National Park, Clallam County, Washington, UNITED STATES (approx. 47.9763°N, 123.6842°W, altitude approximately 670 m above sea level - Google maps). No ectomycorrhizal plants were recorded.
The surrounding habitat was described as not recorded with a substrate of mossy soil.
According to the GPS data the collection was in the Central Pacific Northwest coastal 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 Dsc (Cold, dry summer, cold summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: yes.
Pileus: 15–60 mm diameter; shape convex, umbonate; margin characters fibrillose, involute; viscosity tacky when moist; spotting not recorded; hygrophanous no; colour variation two-colour; with colour at centre cinnamon; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment emarginate; maximum depth up to 3 mm; number of complete lamellae 40; tears absent; white fimbriate edge not recorded.
Stipe: 40–70 x 4–7 {median} x 5–10 {basal} mm; stipe Q 8.0–10.0; base clavate, cylindrical; floccosity fibrillose; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base yes; slenderness measure 20.1; smell sweet; taste not recorded.
Spore deposit colour: analysis not yet complete.
Exsiccata: analysis not yet complete.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape amygdaloid; colour through microscope brown, brown pale; guttulate no; papillate weak; Spore Code: O2; O3; P1; D2.
Basidia: 20.5–36.8 x 4.9–6.8 μm; ave. Q = 4.6; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features septa; Cheilocystidia Ratios: A/M = 1.09; A/B = 0.60; B/M = 1.84.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 200 μm; ixocutis maximum hyphae width 5 μm; ixocutis hyphae encrustation no; shape of trama elements beneath subcutis isodiametric up to 15 μm wide.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (10.0) 10.1–12.4 (12.9) 11.1 11.2 0.700 Width (µm) (5.2) 5.7–7.1 (7.5) 6.4 6.3 0.480 Q (1.40) 1.51–2.04 (2.24) 1.76 1.76 0.17 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (29) 31–50 (52) 39 39 6.12 Apex Width (4.1) 4.3–5.8 (6.3) 5.2 5.3 0.520 Median Width (4.1) 4.2–5.4 (5.5) 4.8 4.8 0.42 Basal Width (6.5) 7.1–10.8 8.7 8.9 1.12
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1941) --- °C --- °C --- mm Collection month (8/1941) --- °C --- °C --- mm Max month (1941) --- °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 | 74.0 | 65.43 | 4th/21 |
| Average length | 11.1 | 11.73 | 18th–19th/21 |
| Average width | 6.4 | 6.57 | 13th–16th/21 |
| Standard deviation of length | 0.7 | 0.78 | 15th–16th/21 |
| Standard deviation of width | 0.48 | 0.40 | 3rd–4th/21 |
| Median length | 11.2 | 11.70 | 17th/21 |
| Median width | 6.3 | 6.55 | 14th–19th/21 |
| Minimum length | 10.0 | 10.18 | 11th–19th/21 |
| Minimum width | 5.2 | 5.72 | 21st/21 |
| Low length | 10.1 | 10.51 | 18th–20th/21 |
| Low width | 5.7 | 5.98 | 15th–18th/21 |
| High length | 12.4 | 13.02 | 17th–18th/21 |
| High width | 7.1 | 7.20 | 12th–14th/21 |
| Max length | 12.9 | 13.54 | 17th–18th/21 |
| Max width | 7.5 | 7.60 | 9th–15th/21 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O2; O3 | 100% of collections; 23% of collections |
| Perispore loosening | P1 | 42% of collections |
| Dextrinoidity | D2 | 95% of collections |