Full name: Hebeloma flammuloides Romagn. (1983)
Published: Sydowia 36: 268 (1947) ["1983"]
Taxonomic status: Heterotypic synonym of H. subtortum
Types: FRANCE: Loiret, Malesherbes (approx. 48.29°N, 2.41°E, alt. approx. 130 m a.s.l.) on acidic soil under Pinus sp., 29 Oct. 1953, G. Robert, det: H. Romagnesi (Holotype. herbarium acc. no. PC0022089, HJB1000062).

Original diagnosis: Pileo 2.5-4.5 cm, medio spisso, pulvinato, non vel vix mammoso, margine involuta, pallido, in margine albido, in medio avellaneo vel e rufulo brunneolo, in ambitu sericeo, alibi minutissime sub lente punctulato. Stipite brevi, 3.2-5 cm x 7-10 mm, cylindrato vel inferne angustiore, albido, dein paulum rufulo vel e rufo brunneolo aetate colorato, mox cavo, sericeo fibrilloso, sursum pruinoso. Carne alba, dein paulum rufescente, odore herbaceo, sapore raphanoideo, vix amariusculo. Lamelles tenuibus, adnato-sinuatis, pallidis, avellaneis, acie irregulari, vix pallidiore. Cortina copiosa, sed levi. Sporis 7.7-9.2 x 5-5.7 μm. Basidiis tetrasporis 25-32 x 6.7-7.5 μm. Pilis marginalibus obtusis, cylindratis vel lageniformibus, 32-60 x 6-8.5-(14) μm. Epicute hyphis tenuibus (x 2.5-3.5 μm), subgelato; subcute minus manifesto quam apis permulta alia Hebelomata. - Humi, interdum in terra ambusta, sub arboribus frondosis vel coniferis.

English translation: Pileus 2.5–4.5 cm, thick at centre, strongly convex, not or hardly umbonate, with involute margin, pale, whitish at margin, at centre hazelnut brown or reddish brownish, entirely sericeous, in places minutely punctate under lens. Stipe short, 3.2–5 cm × 7–10 mm, cylindrical or broadened towards base, whitish, then with age becoming pale reddish or reddish brown, soon hollow, shiny-fibrillose, pruinose at apex. Context white then weakly reddening, odour herbaceous, taste raphanoid, hardly bitter. Lamellae thin, adnate-sinuate, pale, hazelnut brown, with irregular, hardly paler edge. Cortina abundant, but smooth. Spores 7.7–9.2 × 5–5.7 μm. Basidia 25–32 × 6.7–7.5 μm. Marginal hairs, blunt, cylindrical to lageniform, 32–60 × 6–8.5–(14) μm. Epicutis of narrow hyphae, (x 2.5–3.5 μm), subgelatinized; subcutis poorly developed as in most Hebeloma species. In damp places on burnt soil, under deciduous or coniferous trees.

Commentary: Based on morphological and molecular study, as well as the protologue, this is: = Hebeloma subtortum P. Karst.

Full name: Hebeloma flammuloides var. longiventriosopilis Quadr. (1985) ["1984"]
Published: Documents mycologiques 14 (56): 31 (1985) ["1984"]
Taxonomic status: Heterotypic synonym of H. subtortum
Is basionym of: Hebeloma pyrophilum var. longiventriosopilis (Quadr.) Quadr. (1989) ["1988"]

Types: ITALY: Lazio, Castelfusano (approx. 41.7255°N, 12.3867°E, alt. approx. 25 m a.s.l.) under Pinus pinea, 18 Mar. 1983, G. Lonati, det: L. Quadraccia (Holotype. herbarium acc. no. ROHB00868, HJB1000111; Isotype. herbarium acc. no. ROHB00868, HJB1000502).

Original diagnosis: A typo differt pilis marginalibus longioribus, usque ad 115 μm longis (ad apicem usque ad 7,5 μm latis) et ventricosioribus, inferne usque ad 17 μm latis. Habitat in terra arenosa sub Pino pinea (Quercion ilicis).

English translation: Differs from the type variety by its longer and more ventricose (lower part up to 17 μm wide) marginal hairs, up to 115 μm long (at apex up to 7.5 wide). Habitat in sandy soil under Pinus pinea (Quercion ilicis).

Commentary: Unfortunately, we have not been able to generate any sequences from the holotype, but based on a morphological study of the holotype this is: = Hebeloma subtortum P. Karst.