Hebeloma verrucispora - A non-current Hebeloma species

According to our data Hebeloma verrucispora is not the name of a current valid species of Hebeloma. Our database has records for the following similar names

Full name: Psathyrella verrucispora Corner (1994) ["1993"]
Published: Gardens Bulletin Singapore 45 (2): 344 (1994) ["1993"]
Taxonomic status: Heterotypic synonym of H. lactariolens
Notes: Nom. inval. Art. 40.7 - Shenzhen, no herbarium given in protologue.

Types: MALAYSIA: Peninsular Malaysia:Johor:Gunong Panti (approx. 1.8344°N, 103.9006°E, alt. approx. 500 m a.s.l.) on soil in tropical woodland, 15 Aug. 1929, E.J.H. Corner (Holotype. herbarium acc. no. E 00204780, HJB19598).

Homotypic synonyms: Lacrymaria verrucispora Voto (2019); Lacrymaria verrucispora S.M.L. Lee & Voto (2020)

Original diagnosis: Pileus 1.5-8 cm latus, campanulatus dein convexo-planus, centro subdepresso, glaber hygrophanus rivuloso-rugosus, primo badilrufus dein umbrinobruneiis; margin primo fibrilloso rachnoideo. Stipes 2.5-11 cm x 1.5-6 mm ad apicem, 2-10 mm ad basim, albiviliosus fragilis, aibidus dein fuscibrunneus, deorsum ad medium fibrilloso-subzonatus. Velum arachnoideum evanescens. Lamellae adnatae vel sinuato-adnatae, vix confertae, latae, 21-30 primariae 5-9 mm latae, ordinibus 3-4, albidae dein pallide purpureofuscae vel vinaceo-cinnamomeae, acie serrulata albida. Caro 1-1.5 mm crassa in pilei centro, hygrophana. Odor raphanaceus vel ut foenum-graecum. Sporae 9.5-12 x 6.5-8 μm, in cumulo fuscipurpureae, amygdaliformes verruculosae, apice hyalino laevi, sine macula adaxiali. Cheilocystidia 20-35 x 8-14 μm, clavata vel ventricosa cum apice subacute elongate. Pleurocystidia 38-78 x 13-17 μm, ventricosa, tenuiter tunicata, laevia, etiam apice elongate. Superficies pilei cellulis irregulariter clavatis 30-70 x 20-60 μm, tunicis ochraceibrunneis laevibus, plus minus hymeniodermia. In humo in silva, gregaria vel subcaespitosa. Peninsula Malayana.

English translation: Pileus 1.5-8 cm broad, campanulate, then plano-convex, depressed in the centre, glabrous, hygrophanous, rivulose-rugose, at first brown-red then dark brown; margin at first fibrillose, cobwebby. Stipe 2.5-11 cm x 1.5-6 mm at the apex, 2-10 mm at base, with white shaggy hairs, fragile, whitish then dark brown, downwards near the middle fibrillose-subzonate. Veil cobwebby vanishing. Lamellae adnate or sinuate-adnate, hardly crowded, broad, 21-30 full-length, 5-9 mm broad, 3-4 length ranks, whitish then pale purplish-brown or vinaceous-cinnamon, edge serrulate whitish. Context 1-1.5 mm thick in the pileus centre, hygrophanous. Smell raphanoid or fenugreek-like. Spores 9.5-12 x 6.5-8 μm, dark purple in mass, amygdaliform, verruculose, with hyaline smooth apex, lacking an adaxial plage. Cheilocystidia 20-35 x 8-14 μm, clavate or ventricose with a subacute elongate apex. Pleurocystidia 38-78 x 13-17 μm, ventricose, with thinner walls, smooth, and elongate at the apex. Cells of the pileus surface irregularly clavate 30-70 x 20-60 μm, with ochraceous-brown, smooth walls, more or less a hymeniderm. Gregarious or subcaespitose on the ground in a wood. Malay Peninsula.

Commentary: During the course of this research, and our efforts to find relevant information about Hebeloma recorded from the Malay Peninsula, we came across a paper by E.J.H. Corner (1993), effectively published 1994 (Corner 1994 [“1993”]), where he described five new Psathyrella species from the Malay Peninsula. These taxa have ornamented spores, and Corner followed Pegler and Young (1992), who also included a few species with ornamented spores in Psathyrella. According to Corner (1994 [“1993”]), three of these species do not fit well within the genus. On the one hand, their robust stature might suggest they should be placed in Lacrymaria Pat. (which Voto (2019) did for all five of the Corner (1994 [“1993”]) taxa), but while the spores of Lacrymaria are black or certainly very dark in mass, at least the three collections with ornamented spores have fuscous purple or vinaceous brown spores. Also, Lacrymaria spores have a germ pore, not seen in these collections. It is now clear that these three species belong to the genus Hebeloma. Based on the spore color in fresh material, they are members of H. sect. Porphyrospora. Unfortunately, the publication of two of these species is invalid under Art. 40.7 of the International Code (Turland et al. 2018), as the published description does not specify the herbarium in which the types are conserved. It does appear that two of these three species, Psathyrella splendens and P. verrucispora, have been described and classified within Hebeloma since Corner’s publication, as H. parvisporum and H. lactariolens, originally published as Alnicola lactariolens. See Hebeloma lactariolens (Clémençon & Hongo) B.J. Rees & Orlovich.

Full name: Lacrymaria verrucispora Voto (2019)
Published: Rivista Micologica Romana, Bolletino dell'Associazione Micologica Ecologica Romana 107: 95 (2019)
Taxonomic status: Heterotypic synonym of H. lactariolens
Notes: Nom. inval. (Art. 40.7 - Shenzhen). This could be regarded as a replacement name for Psathyrella verrucispora Corner, nom. invalid. Art. 40.7, but is also invalid.

Homotypic synonyms: Lacrymaria verrucispora S.M.L. Lee & Voto (2020)

Homotypic synonym of: Psathyrella verrucispora Corner (1994) ["1993"]

Commentary: This is: = Hebeloma lactariolens (Clémençon & Hongo) B.J. Rees & Orlovich. See Psathyrella verrucispora Corner.

Full name: Lacrymaria verrucispora S.M.L. Lee & Voto (2020)
Published: Rivista Micologica Romana, Boll. AMER 110 (2): 90 (2020)
Taxonomic status: Heterotypic synonym of H. lactariolens
Notes: This could be regarded as a replacement name for Psathyrella verrucispora Corner and Lacrymaria verrucispora Voto, both noms. inval. Art. 40.7.

Homotypic synonym of: Psathyrella verrucispora Corner (1994) ["1993"]; Lacrymaria verrucispora Voto (2019)

Commentary: This is: = Hebeloma lactariolens (Clémençon & Hongo) B.J. Rees & Orlovich. See Psathyrella verrucispora Corner.