Hebeloma luchuense (Photo: Anon.)

Taxonomy

Types: JAPAN: Okinawa, Ryukyus, Iriomote Island, Yaeyama-gun, (approx. 24.2722°N, 123.8663°E, alt. approx. 50 m a.s.l.) on nutrient-enriched, urea-treated soil in woodland under Castanopsis cuspidata var. sieboldii and Quercus miyagii, 3 Jan. 1983, T. Fukiharu (1171) (Holotype. herbarium acc. no. CBM-FB-5368, HJB1000387; Isotype. herbarium acc. no. CBM-FB-43278, HJB15843).

• arrow_drop_downarrow_drop_upEtymology

• arrow_drop_downarrow_drop_upOriginal diagnosis
  Pileo 15-40 mm lato, e convexo subumbonato, demum plano-convexo, margine primum incurvo, glabro, e viscido glutinoso, centro brunneo, margine pallide luteo; carne albida, miti, inodora; lamellis adnexis vel sinuatis, confertis, angustis, e pallide luteo cinnamomeis; stipite 30-60 mm longo, 3-7 mm crasso, basi bulbosa et deorsum radicante, sicco, pallide luteo, squamis brunneis revolutis ornato; velo fibrilloso, cortiniformi; basidiosporis in massa subargillaceis, sub microscopio 9-10 x 4.5-5 μm, e ovoideo amygdaliformibus, minute punctatis.

• arrow_drop_downarrow_drop_upEnglish translation
  Pileus 15-40 mm broad convex to subumbonate, then plano-convex, margin at first incurved, glabrous, viscid to glutinous, brown on the disc, pale yellow on the margin; context whitish, mild, smell not distinctive; lamellae adnexed or sinuate, crowded, narrow, pale yellow to cinnamon; stipe 30-60 mm long, 3-7 mm thick, bulbous at base and rooting, dry, pale whitish, with an ornamentation of brown, recurved scales; veil fibrillose, cortinoid; Basidiospores pale argillaceous in mass, under the microscope 9-10 x 4.5-5 μm, ovoid to amygdaliform, minutely punctate.

Description

Description of Hebeloma luchuense based on 6 collections

• arrow_drop_downarrow_drop_upMacroscopic description
  Pileus: (15) 27 (40) mm diameter; shape convex or strongly umbonate; characters remains of universal veil; margin characters involute; viscosity tacky when moist; colour variation two color; colour at centre often umber or dark brick.

  Lamellae: attachment adnexed or emarginate; maximum depth up to 2 mm; number of complete lamellae 52–68; presence of tears Not recorded; white fimbriate edge weak.

  Cortina presence: yes.

  Stipe: (30) 45 (60) x (3) 5 (7) {median} x (5) 7 (10) {basal} mm; stipe Q 8.6–10.0; base shape bulbous; floccosity fibrillose or floccose; rooting yes; thick rhizoids at base Not recorded;

  Context: Texture firm; stipe interior hollow or stuffed; stipe flesh discolouring Not recorded; slenderness measure up to 16.4; smell Not recorded; taste mild where recorded.

  Spore deposit colour: Not recorded.

  Exsiccata characters: Not recorded.

• arrow_drop_downarrow_drop_upMicroscopic description
  Spores: shape amygdaloid; colour in microscope often yellow, occasionally yellow brown; guttules no. papilla no; Spore Code: O1 O2; P0 P1; (D0) D1 (D2).

  Basidia: 14–26 (27) x 4–7 μm; ave. Q 3.2–3.6; spore arrangement 4 spored;

  Cheilocystidia: main shape cylindrical; special features observed often septa or short, occasionally many collapsed in exsiccata; cheilocystidia ratios: A/M = 1.01–1.19; A/B = 0.97–1.53; B/M = 0.80–1.06.

  Pleurocystidia: none seen.

  Ixocutis: epicutis thickness (measured from exsiccata) up to 200 μm; ixocutis hyphae width up to 7 μm; ixocutis hyphae encrustation yes; shape of trama elements beneath subcutis oblong, ovate or spherical up to 20 μm wide.

  Caulocystidia: Similar to cheilocystidia but larger.

• arrow_drop_downarrow_drop_upSpore measurements

• arrow_drop_downarrow_drop_upCheilocystidia measurements

• arrow_drop_downarrow_drop_upHabitat and distribution
  Hebeloma luchuense's preferred habitat appears to be woodland with nutrient-enriched, urea-treated soil. No associated genera are recorded for the species. No growth habit has been recorded.

  According to our current collections, the species is found only in Asia-Temperate. On the continent, collections have been found only in the Nansei Islands subtropical evergreen 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. (tropical & subtropical moist broadleaf forests biome). From collector information, it appears collections have been found only in the 1.4 Forest – Temperate 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.. Within Temperate Asia all our records are from Eastern Asia (Japan).

Geographic distribution

Phenology

• arrow_drop_downarrow_drop_upAdditional cited collections

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