Hebeloma.org: Collection HJB1000536

Taxonomy

Collection 1000536 (herbarium acc. no. TENN-F-037510) is Hebeloma album. It is the holotype of heterotypic synonym Hebeloma rivulosum Hesler (1977).

Description

Collecting details

Collection 1000536 was collected by J. Restivo (37510), det: L.R. Hesler on 13th September 1972 in Sevier, Gatlinburg, Gatlinburg, GSMNP, [Great Smoky Mountains National Park], Roaring Fork, Tennessee, UNITED STATES (approx. 35.6908°N, 83.4775°W, altitude approximately 750 m above sea level - Google maps). No ectomycorrhizal plants were recorded.
The surrounding habitat was described as mixed woodland with a substrate of 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 Appalachian-Blue Ridge 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 Cfa (Temperate, no dry season, hot summer).

Macroscopic description
Cortina present: no.
Pileus: 15–35 mm diameter; shape convex; margin characters smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation unicolor; with colour at centre pinkish buff; and colour at margin pale pinkish buff; with remains of universal veil yes.
Lamellae: attachment emarginate; maximum depth not recorded; number of complete lamellae 56; tears not recorded; white fimbriate edge present.
Stipe: 25–40 x 3–5 {median} x 3–5 {basal} mm; stipe Q 8.0–8.3; base cylindrical; floccosity floccose at apex; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base not recorded; slenderness measure 11.5; smell raphanoid; taste bitter.
Spore deposit colour: brownish olive.
Exsiccata: analysis not yet complete.

Microscopic description
Spores: shape amygdaloid, limoniform; colour through microscope brown; guttulate no; papillate no; Spore Code: O3; P2; D2.
Basidia: 19.7–25.2 x 6.8–8.1 μm; ave. Q = 2.9; basidia spore nature not recorded.
Cheilocystidia: main shape clavate-lageniform or clavate-ventricose; special features many collapsed in exsiccata, yellow contents; Cheilocystidia Ratios: A/M = 1.95; A/B = 1.29; B/M = 1.63.
Pleurocystidia: yes.
Ixocutis: analysis not yet complete.
Caulocystidia: analysis not yet complete.

Spore (min) 5%-95% (max) mean median S.D.
Length (µm) (9.9) 10.1–11.9 (12.5) 11.0 11.1 0.630
Width (µm) (5.5) 5.7–6.6 (6.8) 6.1 6.0 0.320
Q (1.61) 1.68–1.98 (2.03) 1.82 1.80 0.1

Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D.
Length (28) 29–50 (51) 39 40 6.16
Apex Width (5.5) 5.7–7.6 (7.9) 6.5 6.3 0.720
Median Width 2.5–4.4 3.4 3.2 0.72
Basal Width (2.2) 3.3–8.1 (8.9) 5.5 5.8 1.78

Spore	(min) 5%-95% (max)	mean	median	S.D.
Length (µm)	(9.9) 10.1–11.9 (12.5)	11.0	11.1	0.630
Width (µm)	(5.5) 5.7–6.6 (6.8)	6.1	6.0	0.320
Q	(1.61) 1.68–1.98 (2.03)	1.82	1.80	0.1

Cheilocystidium (µm)	(min) 5%-95% (max)	mean	median	S.D.
Length	(28) 29–50 (51)	39	40	6.16
Apex Width	(5.5) 5.7–7.6 (7.9)	6.5	6.3	0.720
Median Width	2.5–4.4	3.4	3.2	0.72
Basal Width	(2.2) 3.3–8.1 (8.9)	5.5	5.8	1.78

Temperature calculation
Max temp Min temp Precipitation
Annualised average (1972) 15.65 °C 3.73 °C 155.96 mm
Collection month (9/1972) 23.06 °C 11.15 °C 163.17 mm
Max month (1972) 24.18 °C 12.55 °C 199.35 mm

	Max temp	Min temp	Precipitation
Annualised average (1972)	15.65 °C	3.73 °C	155.96 mm
Collection month (9/1972)	23.06 °C	11.15 °C	163.17 mm
Max month (1972)	24.18 °C	12.55 °C	199.35 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	61.0	68.93	22^nd–23^rd/41
Average length	11.0	11.67	36^th–39^th/43
Average width	6.1	6.42	31^st–32^nd/43
Standard deviation of length	0.63	0.75	34^th/41
Standard deviation of width	0.32	0.39	25^th–27^th/41
Median length	11.1	11.63	30^th–32^nd/41
Median width	6.0	6.41	31^st–32^nd/41
Minimum length	9.9	10.14	30^th–32^nd/43
Minimum width	5.5	5.59	24^th–26^th/43
Low length	10.1	10.54	31^st–34^th/43
Low width	5.7	5.86	29^th/43
High length	11.9	12.83	37^th/43
High width	6.6	7.03	32^nd–33^rd/43
Max length	12.5	13.50	38^th–40^th/43
Max width	6.8	7.37	35^th/43

Spore feature	Value	Commonalities
Ornamentation	O3	100% of collections
Perispore loosening	P2	25% of collections
Dextrinoidity	D2	69% of collections