Hebeloma.org: Collection HJB18401

Taxonomy

Collection 18401 is Hebeloma excedens.

Description

Collecting details

Collection 18401 was collected by L. Davies on 20th October 2018 in Forest Resource Education Centre, Jackson, New Jersey, UNITED STATES (40.0957°N, 74.3228°W, altitude approximately 40 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Pinus) was present.
The surrounding habitat was described as mixed pine-barrens with a substrate of grassy 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 Atlantic coastal pine barrens 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 Dfa (Cold, no dry season, hot summer).

Macroscopic description
Cortina present: yes.
Pileus: 35–49 mm diameter; shape umbonate strongly; margin characters overhanging pileus, smooth; viscosity tacky when moist; spotting no; hygrophanous no; colour variation two-colour; with colour at centre cinnamon; and colour at margin cream; with remains of universal veil yes.
Lamellae: attachment emarginate; maximum depth up to 6 mm; number of complete lamellae 53; tears absent; white fimbriate edge weak.
Stipe: 34–60 x 5 {median} x 5 {basal} mm; stipe Q 6.8–10.9; base cylindrical; floccosity fibrillose; rooting no; mycelial chords no.
Context: texture firm; stipe interior hollow; stipe flesh discolouring from base no; slenderness measure 10.0; smell raphanoid; taste not recorded.
Spore deposit colour: brownish olive.
Exsiccata: analysis not yet complete.

Microscopic description
Spores: shape ellipsoid, ovoid; colour through microscope yellow; guttulate no; papillate no; Spore Code: O1; O2; P0; D0.
Basidia: 27.5–33.0 x 7.9–9.4 μm; ave. Q = 3.4; basidia spore nature not recorded.
Cheilocystidia: main shape lageniform, ventricose; special features branching, septa; Cheilocystidia Ratios: A/M = 1.14; A/B = 0.63; B/M = 1.84.
Pleurocystidia: no.
Ixocutis: epicutis thickness (measured from exsiccata) 120 μm; ixocutis maximum hyphae width 6 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis cylindrical, thickly sausage-shaped up to 12 μm wide.
Caulocystidia: caulocystidia maximum length 95 μm.

Spore (min) 5%-95% (max) mean median S.D.
Length (µm) (7.7) 8.6–10.6 (10.8) 9.8 9.8 0.590
Width (µm) (5.2) 5.4–6.2 (6.5) 5.8 5.8 0.250
Q (1.30) 1.43–1.84 (1.88) 1.69 1.71 0.12

Cheilocystidium (µm) (min) 5%-95% (max) mean median S.D.
Length 33–50 (59) 42 42 6.76
Apex Width (3.4) 3.7–5.1 (5.2) 4.3 4.2 0.510
Median Width (3.0) 3.1–4.7 3.8 3.8 0.48
Basal Width 5.3–8.0 (8.8) 6.9 7.2 0.9

Spore	(min) 5%-95% (max)	mean	median	S.D.
Length (µm)	(7.7) 8.6–10.6 (10.8)	9.8	9.8	0.590
Width (µm)	(5.2) 5.4–6.2 (6.5)	5.8	5.8	0.250
Q	(1.30) 1.43–1.84 (1.88)	1.69	1.71	0.12

Cheilocystidium (µm)	(min) 5%-95% (max)	mean	median	S.D.
Length	33–50 (59)	42	42	6.76
Apex Width	(3.4) 3.7–5.1 (5.2)	4.3	4.2	0.510
Median Width	(3.0) 3.1–4.7	3.8	3.8	0.48
Basal Width	5.3–8.0 (8.8)	6.9	7.2	0.9

Temperature calculation
Max temp Min temp Precipitation
Annualised average (2018) 18.11 °C 7.76 °C 138.84 mm
Collection month (10/2018) 19.23 °C 9.61 °C 127.90 mm
Max month (2018) 30.73 °C 20.60 °C 223.35 mm

	Max temp	Min temp	Precipitation
Annualised average (2018)	18.11 °C	7.76 °C	138.84 mm
Collection month (10/2018)	19.23 °C	9.61 °C	127.90 mm
Max month (2018)	30.73 °C	20.60 °C	223.35 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	146.0	68.23	1^st–4^th/52
Average length	9.8	9.33	11^th–14^th/52
Average width	5.8	5.68	12^th–24^th/52
Standard deviation of length	0.59	0.71	44^th/52
Standard deviation of width	0.25	0.36	49^th/52
Median length	9.8	9.35	10^th–14^th/52
Median width	5.8	5.69	16^th–25^th/52
Minimum length	7.7	7.67	23^rd–25^th/52
Minimum width	5.2	4.81	10^th–14^th/52
Low length	8.6	8.15	13^th–14^th/52
Low width	5.4	5.16	9^th–16^th/52
High length	10.6	10.41	16^th–22^nd/52
High width	6.2	6.25	30^th–34^th/52
Max length	10.8	10.78	24^th–30^th/52
Max width	6.5	6.53	16^th–33^rd/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