Hebeloma.org: Collection HJB13012

Taxonomy

Collection 13012 (herbarium acc. no. CHE020422) is Hebeloma velatum. It is the lectotype of heterotypic synonym Hebeloma dunense L. Corb. & R. Heim (1929).

Description

Collecting details

Collection 13012 was collected by R. Corbiere on 22nd May 1926 in Dunes de Vasteville, Manche, FRANCE (approx. 49.5953°N, 1.7719°W, altitude approximately 5 m above sea level - Google maps). The ectomycorrhizal family Salicaceae (genus Salix) was present.
The surrounding habitat was described as dune 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. 13.3: Coastal Sand Dunes.
According to the GPS data the collection was in the European Atlantic 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 Cfb (Temperate, no dry season, warm summer).

Macroscopic description
Cortina present: yes.
Pileus: 10–30 mm diameter; shape convex, umbonate; margin characters fibrillose, involute; viscosity tacky when moist; spotting no; hygrophanous no; colour variation two-colour; with colour at centre not recorded; and colour at margin not recorded; with remains of universal veil yes.
Lamellae: attachment adnate, decurrent tooth, emarginate; maximum depth not recorded; number of complete lamellae 48; tears absent; white fimbriate edge weak.
Stipe: 15–30 x 3–6 {median} x 3–6 {basal} mm; stipe Q 5.0; base cylindrical; floccosity fibrillose; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base not recorded; slenderness measure 6.3; smell none; taste mild.
Spore deposit colour: analysis not yet complete.
Exsiccata: normal.

Microscopic description
Spores: shape ellipsoid; colour through microscope yellow pale; guttulate no; papillate no; Spore Code: O1; O2; P0; D0; D1.
Basidia: 18.8–20.4 x 6.6–7.4 μm; ave. Q = 2.8; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features none; Cheilocystidia Ratios: A/M = 1.10; A/B = 0.58; B/M = 1.90.
Pleurocystidia: no.
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, thickly sausage-shaped up to 25 μm wide.
Caulocystidia: analysis not yet complete.

Spore (min) 5%-95% (max) mean median S.D.
Length (µm) (8.4) 9.2–11.3 (11.7) 10.4 10.4 0.720
Width (µm) (5.4) 5.7–6.9 (7.2) 6.3 6.2 0.370
Q (1.37) 1.43–1.84 (1.94) 1.66 1.67 0.12

Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D.
Length (27) 28–41 36 36 5.14
Apex Width (3.2) 3.4–6.8 (7.5) 5.2 5.2 1.240
Median Width (3.2) 3.4–5.1 4.4 4.6 0.67
Basal Width 7.3–10.1 (10.6) 8.2 7.6 1.24

Spore	(min) 5%-95% (max)	mean	median	S.D.
Length (µm)	(8.4) 9.2–11.3 (11.7)	10.4	10.4	0.720
Width (µm)	(5.4) 5.7–6.9 (7.2)	6.3	6.2	0.370
Q	(1.37) 1.43–1.84 (1.94)	1.66	1.67	0.12

Cheilocystidium (µm)	(min) 5%-95% (max)	mean	median	S.D.
Length	(27) 28–41	36	36	5.14
Apex Width	(3.2) 3.4–6.8 (7.5)	5.2	5.2	1.240
Median Width	(3.2) 3.4–5.1	4.4	4.6	0.67
Basal Width	7.3–10.1 (10.6)	8.2	7.6	1.24

Temperature calculation
Max temp Min temp Precipitation
Annualised average (1926) --- °C --- °C --- mm
Collection month (5/1926) --- °C --- °C --- mm
Max month (1926) --- °C --- °C --- mm

	Max temp	Min temp	Precipitation
Annualised average (1926)	--- °C	--- °C	--- mm
Collection month (5/1926)	--- °C	--- °C	--- mm
Max month (1926)	--- °C	--- °C	--- mm

Analyse this collection
- See this collection in our species identifier.
- See this collection's sequences in Genbank .

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	54.0	56.22	68^th–71^st/111
Average length	10.4	10.95	88^th–90^th/117
Average width	6.3	6.41	61^st–72^nd/117
Standard deviation of length	0.72	0.72	48^th–53^rd/107
Standard deviation of width	0.37	0.38	50^th–54^th/107
Median length	10.4	10.96	83^rd–84^th/107
Median width	6.2	6.42	70^th–79^th/107
Minimum length	8.4	9.35	105^th–106^th/113
Minimum width	5.4	5.60	77^th–91^st/113
Low length	9.2	9.84	95^th–104^th/113
Low width	5.7	5.85	62^nd–76^th/113
High length	11.3	12.01	91^st–96^th/113
High width	6.9	7.02	59^th–67^th/113
Max length	11.7	12.70	97^th–102^nd/113
Max width	7.2	7.36	62^nd–70^th/113

Spore feature	Value	Commonalities
Ornamentation	O1; O2	98% of collections; 100% of collections
Perispore loosening	P0	100% of collections
Dextrinoidity	D0; D1	83% of collections; 99% of collections