Taxonomy
Collection 1000492 (herbarium acc. no. MICH 10814) is Hebeloma excedens. It is the holotype of heterotypic synonym Hebeloma urbanicola A.H. Sm., V.S. Evenson & Mitchel (1983).Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000492 was collected by A.H. Smith (34233) on 7th October 1949 in Ann Arbor, Washtenaw County, Michigan, UNITED STATES (approx. 42.2753°N, 83.7308°W, altitude approximately 270 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: yes.
Pileus: 15–30 mm diameter; shape umbonate broadly; margin characters fibrillose, involute; viscosity tacky when moist; spotting not recorded; hygrophanous no; colour variation unicolor; with colour at centre yellowish brown; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment adnexed; maximum depth not recorded; number of complete lamellae 38; tears absent; white fimbriate edge absent.
Stipe: 25–40 x 2–3 {median} x 2–3 {basal} mm; stipe Q 11.4–12.5; base cylindrical; floccosity fibrillose; rooting no; mycelial chords no.
Context: texture firm; stipe interior not recorded; stipe flesh discolouring from base no; slenderness measure 18.0; smell none; taste none.
Spore deposit colour: analysis not yet complete.
Exsiccata: analysis not yet complete.
- arrow_drop_downarrow_drop_upMicroscopic description
Spores: shape ellipsoid, ovoid; colour through microscope yellow pale; guttulate no; papillate no; Spore Code: O1; P0; D0.
Basidia: 21.0–25.9 x 6.2–7.4 μm; ave. Q = 3.4; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features septa, sparse; Cheilocystidia Ratios: A/M = 1.14; A/B = 0.69; B/M = 1.69.
Pleurocystidia: no.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (6.2) 7.0–9.6 (10.4) 8.4 8.6 0.830 Width (µm) (4.2) 4.6–5.4 (6.9) 5.1 5.1 0.350 Q (1.41) 1.48–1.86 (2.10) 1.67 1.67 0.13 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (24) 25–46 (48) 36 35 7.67 Apex Width (2.6) 2.7–5.1 4.0 4.2 0.860 Median Width (2.1) 2.5–4.5 (5.3) 3.6 3.6 0.76 Basal Width (4.2) 4.6–7.3 (8.3) 5.9 5.9 0.95
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1949) --- °C --- °C --- mm Collection month (10/1949) --- °C --- °C --- mm Max month (1949) --- °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 | 79.0 | 68.23 | 17th/52 |
| Average length | 8.4 | 9.33 | 52nd/52 |
| Average width | 5.1 | 5.68 | 52nd/52 |
| Standard deviation of length | 0.83 | 0.71 | 8th/52 |
| Standard deviation of width | 0.35 | 0.36 | 28th–31st/52 |
| Median length | 8.6 | 9.35 | 47th–48th/52 |
| Median width | 5.1 | 5.69 | 52nd/52 |
| Minimum length | 6.2 | 7.67 | 51st/52 |
| Minimum width | 4.2 | 4.81 | 47th–51st/52 |
| Low length | 7.0 | 8.15 | 52nd/52 |
| Low width | 4.6 | 5.16 | 50th/52 |
| High length | 9.6 | 10.41 | 50th–52nd/52 |
| High width | 5.4 | 6.25 | 52nd/52 |
| Max length | 10.4 | 10.78 | 43rd–44th/52 |
| Max width | 6.9 | 6.53 | 3rd–7th/52 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O1 | 100% of collections |
| Perispore loosening | P0 | 100% of collections |
| Dextrinoidity | D0 | 94% of collections |