Taxonomy
Collection 1000268 (herbarium acc. no. NYS-F-001123) is Hebeloma excedens. It is the holotype of synonym Agaricus excedens Peck [as "Agaricus (Hebeloma) excedens"] (1872).Description
- arrow_drop_downarrow_drop_upCollecting details
Collection 1000268 was collected by C.H. Peck in October 1870 in Saratoga, Saratoga county, New York, UNITED STATES (approx. 43.0831°N, 73.7846°W, altitude approximately 100 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Pinus) was present.
The surrounding habitat was described as woodland with a substrate of sandy 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. 1.4: Forest – Temperate.
According to the GPS data the collection was in the Northeast US 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 Broadleaf & Mixed Forests) and Koppen climate code Dfa (Cold, no dry season, hot summer).
- arrow_drop_downarrow_drop_upMacroscopic description
Cortina present: yes.
Pileus: up to 25 mm diameter; shape convex, umbonate broadly; margin characters appendiculate; viscosity tacky when moist; spotting not recorded; hygrophanous not recorded; colour variation unicolor; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil not recorded.
Lamellae: attachment emarginate; maximum depth not recorded; number of complete lamellae 48; tears not recorded; white fimbriate edge weak.
Stipe: 50 x 3 {median} x 3 {basal} mm; stipe Q 14.3; base cylindrical; floccosity fibrillose; rooting no; mycelial chords no.
Context: texture firm; stipe interior stuffed; stipe flesh discolouring from base not recorded; slenderness measure 28.6; smell raphanoid; taste raphanoid.
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 brown pale; guttulate no; papillate no; Spore Code: O1; O2; P0; D0.
Basidia: 20.3–20.5 x 6.1–6.6 μm; ave. Q = 3.2; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features many collapsed in exsiccata, septa; Cheilocystidia Ratios: A/M = 1.23; A/B = 0.69; B/M = 1.82.
Pleurocystidia: only close to lamella edge.
Ixocutis: epicutis thickness (measured from exsiccata) 65 μm; ixocutis maximum hyphae width 6 μm; ixocutis hyphae encrustation no; shape of trama elements beneath subcutis ellipsoid up to 16 μm wide.
Caulocystidia: analysis not yet complete.
Spore (min) 5%-95% (max) mean median S.D. Length (µm) (6.0) 7.3–10.1 (11.1) 8.6 8.5 0.900 Width (µm) (4.2) 4.9–6.4 (6.8) 5.6 5.6 0.460 Q (1.34) 1.39–1.73 (1.89) 1.54 1.53 0.11 Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D. Length (30) 32–50 (51) 41 40 5.98 Apex Width (4.7) 5.0–7.3 (7.8) 6.0 5.9 0.710 Median Width 4.0–6.3 (6.9) 5.0 4.8 0.84 Basal Width (5.8) 6.4–11.4 (12.4) 9.0 9.2 1.7
- arrow_drop_downarrow_drop_upTemperature calculation
Max temp Min temp Precipitation Annualised average (1870) --- °C --- °C --- mm Collection month (10/1870) --- °C --- °C --- mm Max month (1870) --- °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 | 88.0 | 68.23 | 14th/52 |
| Average length | 8.6 | 9.33 | 48th–49th/52 |
| Average width | 5.6 | 5.68 | 30th–36th/52 |
| Standard deviation of length | 0.9 | 0.71 | 3rd/52 |
| Standard deviation of width | 0.46 | 0.36 | 4th/52 |
| Median length | 8.5 | 9.35 | 49th–50th/52 |
| Median width | 5.6 | 5.69 | 30th–36th/52 |
| Minimum length | 6.0 | 7.67 | 52nd/52 |
| Minimum width | 4.2 | 4.81 | 47th–51st/52 |
| Low length | 7.3 | 8.15 | 46th–47th/52 |
| Low width | 4.9 | 5.16 | 34th–45th/52 |
| High length | 10.1 | 10.41 | 38th–41st/52 |
| High width | 6.4 | 6.25 | 10th–22nd/52 |
| Max length | 11.1 | 10.78 | 8th–9th/52 |
| Max width | 6.8 | 6.53 | 8th–10th/52 |
| Spore feature | Value | Commonalities |
|---|---|---|
| Ornamentation | O1; O2 | 100% of collections; 23% of collections |
| Perispore loosening | P0 | 100% of collections |
| Dextrinoidity | D0 | 94% of collections |