Full name: Hebeloma ochroalbidum Bohus (1972)
Published: Annales Historico-Naturales Musei Nationalis Hungarici 64: 71 (1972)
Taxonomic status: Heterotypic synonym of H. eburneum
Types: HUNGARY: Fot Com. Pest (approx. 47.5°N, 19.4°E, alt. approx. 225 m a.s.l.) on sandy soil in deciduous woodland under Populus sp., 20 Oct. 1971, I. Schumeth, det: G. Bohus, M. Babos (Holotype. herbarium acc. no. BP 48.427, HJB1000052).

Original diagnosis: Pileus 5,5-10 cm in diam., convexus-deplanatus carnosus albidus in medio pallide ochraceus ex toto albido-ochraceus vel pallide ochraceus glaber pluviis diebus viscidus initio margine incurvatus. Lamellae usque ad 5 mm latae, initio pallidae, dein plus-minus isabellino-ochraceae, demum sordide brunneae, acie sub vitro optico manifeste albide ciliatae, pluviis diebus guttulatis aquosis instructae. Stipe 4-8 cm altus, 1-2 cm crassus, cylindricus vel ad basin parum incrassatus, albus, ex toto, imprimis autem superius subtiliter flocculoso-furfuraceus, firmus. Caro albus, albidus, reactiones chemicae: per tinctorum guajaci brunneus, per ammoniam, formaldehydum solutum, solutionem guajacoli, ferrum sulphuricum oxydatum, solutionem Lugol, acidum nitricum, phenol-analinum, solutionem Pyramidon, natrium hydroxidatum immutatus. Sapor non distinctus. Odor plerumque absens, vel parum raphanaceus. Sporae 10,5-12,5(-14) x 5,5-7(-8,5) μm, amygdalae-formes, dense insigniterque punctatae, pariete crassae, melleae. Basidia tetraspora, clavata, 25-35 x 7-11 μm. Cheilocystidia numerosa, clavata, cylindracea, nonnunquam subventricosa, peduncula longuisculo, hyaline, (45-)60-90 x (5-)7-9 μm. Sporae in cumulo sordide brunneae.

English translation: Pileus 5.5–10 cm in diam., convex-expanded, fleshy, whitish and in the centre pale ochre, entirely whitish ochre or light ochre; smooth; in wet weather viscid; margin at first incurved. Lamellae up to 5 mm wide; at first pale, them more or less Isabella-ochre, at length sordid brown; edge under magnifying glass white setulose (ciliate); with watery drops in wet weather. Stipe 4–8 cm high, 1–2 cm wide; cylindrical or with a thicker base; white; entirely but especially upwards fine floccose-grained; firm. Flesh white, whitish; chemical reactions: with guaiac tincture brown, with ammonia, formalin, guaiacol solution, iron sulphate, Lugol reagent, nitric acid, phenol-aniline, pyramidon solution and sodium hydroxide negative. Taste not distinctive. Odour mostly absent or a little radish-like. Spores 10.5–12.5(–14) × 5.5–7(–8.5) μm, amygdaloid, densely and conspicuously punctate, thick-walled, melleous. Basidia four-spored, clavate, 25–35 × 7–11 μm. Cheilocystidia numerous, clavate, cylindrical, sometimes subventricose, with a longer peduncle, hyaline, (45–)60–90 × (5–)7–9 μm. Spore print sordid brown. In poplar woodlands on a sandy substrate.

Commentary: We have examined the holotype both morphologically and molecularly and this is: = Hebeloma eburneum Malenςon.