Full name: Hebeloma vernale Velen. (1920)
Published: Ceske Houby: 391 (1919) ["1920"]
Taxonomic status: We have not been able to unambiguously determine the current genus of this name.
Types: CZECH REPUBLIC: , J. Velenovsky (Neotype. herbarium acc. no. PRC B249, HJB1000233). Neotype designated by Beker et al., Hebeloma (Fr.) P. Kumm.: (2016) page 655 (MBT202540).

The preserved material is undated and unlocalized, and hence can only be designated as neotype as there is no evidence it is original material.

Original diagnosis: Pileo 2-5 cm diam., subfirme carnoso, obtuse conico-campanulato, tum expanso, margine diu involuto, saepe excentrico, perfecte glabro, levi, conspecte viscido, pallide ochraceo-alutaceo, iuventute cortina abundanti alba cum stipite coniuncto. Stipite pilei diam. duplo longiori, firmo, saepe basi adunco, 8-10 mm crasso, albo, basi praecipue pressione fusco, furfuraceo-fibrilloso, apice exanulato. Lamellis confertis, latis, postice late emarginatis, primum pure albis, tum pallide ochraceis, acie albis. Carne penetranter amoene fructiodora. Sporis pallide lutescentibus, globoso-ovoideis, 8-9 μm. Cystidiis numerosis, filiformibus, obtuse rotundatis. In latebris udis calidis silvarum et in fruticetis locis graminosis semper gregarium et primo vere (martio-aprili) in vicinitate urbis Pragae: Sv. Prokop, Butovice, Radotin, Chotec, Chuchle, Slivenec. Hebelomati velato Vel. affine, sed odore amoeno et annuli deficientia primo visu discrepat. Britzelmayer e Bavaria Hebeloma albidocortinatum (1895) descripsit, quod probabiliter affine est, sed diagnosis auctoris manca est, praecipue viscositatem pilei et odorem non commemorat. Fungus noster edulis et saporis excellentis est.

English translation: Pileus 2–5 cm diam., fleshy, not very firm, bluntly conico-campanulate, then expanding, margin involute at first, often eccentric, perfectly glabrous, smooth, clearly viscous, pale ochraceous-yellow, when young with abundant cortina which is connected with the stipe. Stipe twice as long as diameter of pileus, firm, often with curved base, 8–10 mm thick, white, at base turning brown when handled, furfuraceous-fibrillose, without annulus at apex. Lamellae crowded, broad, broadly emarginate, at first purely white, then pale ochraceous, with white edge. Context with penetrating nauseous fruity odour. Spores pale yellowish, globose-ovoid, 8–9 μm. Cystidia abundant, filiform, bluntly rounded. In dark, moist and warm places in forest and in grassy spots in copses always in groups and in spring (March to April) near the town of Prague: Sv. Prokop, Butovice, Radotin, Chotec, Chuchle, Slivenec. Close to Hebeloma velatum Velen., but differing at first sight by the nauseating odour and lack of annulus. Britzelmayer described Hebeloma albidocortinatum from Bavaria that probably is close, but the description of that author is incomplete, particularly not mentioning the viscosity of the pileus and the odour.

Commentary: The ‘original diagnosis’ above is the translation into Latin from the original Czech by Pilat, Opera Bot. Čechica 6: 134 (1948). Studies of the neotype revealed that Hebeloma vernale is not a Hebeloma. The spores are thick-walled and subglobose to ellipsoid.