menu
×

Taxonomy

Collection 1000464 (herbarium acc. no. MICH 10789) is Hebeloma discomorbidum. It is the holotype of heterotypic synonym Hebeloma praecaespitosum A.H. Sm., V.S. Evenson & Mitchel (1983).

Description

  • arrow_drop_downarrow_drop_upCollecting details

    Collection 1000464 was collected by A.H. Smith, J.F. Ammirati (89627) on 3rd August 1979 in above Snowmass Village, Burnt Mountain, Pitkin County, Colorado, UNITED STATES (approx. 39.2129°N, 106.9196°W, altitude approximately 2450 m above sea level - Google maps). The ectomycorrhizal family Pinaceae (genus Picea) was present.

    The surrounding habitat was described as coniferous, subalpine woodland with a substrate of litter, 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. 1.1: Forest – Boreal.

    According to the GPS data the collection was in the Colorado Rockies 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 Conifer Forests) and Koppen climate code Dfb (Cold, no dry season, warm summer).

  • arrow_drop_downarrow_drop_upMacroscopic description

    Cortina present: yes.

    Pileus: 15–40 mm diameter; shape convex, umbonate strongly; margin characters involute; viscosity tacky when moist; spotting no; hygrophanous yes; colour variation unicolor; with colour at centre cinnamon; and colour at margin not recorded; with remains of universal veil yes.

    Lamellae: attachment adnate, emarginate; maximum depth not recorded; number of complete lamellae 46; tears absent; white fimbriate edge not recorded.

    Stipe: 40–90 x 4–7 {median} x 4–7 {basal} mm; stipe Q 10.0–12.9; base cylindrical; floccosity fibrillose; rooting no; mycelial chords no.

    Context: texture firm; stipe interior not recorded; stipe flesh discolouring from base yes; slenderness measure 27.8; smell not recorded; taste not recorded.

    Spore deposit colour: analysis not yet complete.

    Exsiccata: analysis not yet complete.

  • arrow_drop_downarrow_drop_upMicroscopic description

    Spores: shape amygdaloid, limoniform; colour through microscope not recorded; guttulate not recorded; papillate yes; Spore Code: O1; P0; D3; D4.

    Basidia: 20.6–28.1 x 6.3–8.1 μm; ave. Q = 3.5; basidia spore nature not recorded.

    Cheilocystidia: main shape balloon-shaped, lageniform, pyriform, ventricose; special features median thickening; Cheilocystidia Ratios: A/M = 1.20; A/B = 0.63; B/M = 2.00.

    Pleurocystidia: no.

    Ixocutis: analysis not yet complete.

    Caulocystidia: analysis not yet complete.

    Spore(min) 5%-95% (max)meanmedianS.D.
    Length (µm)(10.6) 11.0–14.5 (14.9)12.412.31.040
    Width (µm)(6.0) 6.4–8.2 (8.3)7.27.20.520
    Q(1.52) 1.57–1.93 (1.99)1.711.670.12

    Cheilocystidium (µm)(min) 5%-95% (max)meanmedianS.D.
    Length(37) 41–56 (57)48475.3
    Apex Width4.7–6.2 (6.3)5.35.20.490
    Median Width(3.2) 3.6–5.2 (5.4)4.54.60.58
    Basal Width(5.6) 6.2–11.8 (15.1)8.88.22.22
  • arrow_drop_downarrow_drop_upTemperature calculation
    Max tempMin tempPrecipitation
    Annualised average (1979)8.48 °C-8.07 °C32.69 mm
    Collection month (8/1979)20.37 °C3.43 °C33.98 mm
    Max month (1979)22.71 °C3.82 °C82.61 mm

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 measurementsMy valueSpecies mean valuePosition
Count 53.0 43.34 39th–41st/99
Average length 12.4 11.86 22nd–24th/100
Average width 7.2 6.83 12th–27th/100
Standard deviation of length 1.04 0.80 9th–10th/99
Standard deviation of width 0.52 0.39 6th–9th/99
Median length 12.3 11.83 24th–28th/99
Median width 7.2 6.82 13th–28th/99
Minimum length 10.6 10.21 30th–31st/100
Minimum width 6.0 5.99 49th–60th/100
Low length 11.0 10.66 27th–33rd/100
Low width 6.4 6.24 31st–45th/100
High length 14.5 13.06 6th–8th/100
High width 8.2 7.41 3rd–6th/100
Max length 14.9 13.54 13th–16th/100
Max width 8.3 7.66 11th–15th/100
Spore featureValueCommonalities
Ornamentation O1 36% of collections
Perispore loosening P0 72% of collections
Dextrinoidity D3; D4 83% of collections; 6% of collections