Hebeloma bicoloratum - A non-current Hebeloma species

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

Full name: Hebeloma bicoloratum A.H. Sm., V.S. Evenson & Mitchel (1983)
Published: The Veiled Species of Hebeloma in the Western United States: 166 (1983)
Taxonomic status: Heterotypic synonym of H. excedens
Types: UNITED STATES: Michigan: Washtenaw County, Stinchfield Woods, NW of Dexter (approx. 42.4028°N, 83.9247°W, alt. approx. 300 m a.s.l.) under Picea sp., 12 Oct. 1977, A.H. Smith (88316) (Holotype. herbarium acc. no. MICH 10733, HJB1000326).

Original diagnosis: Pileus 2-4 cm latus, demum late convexus vel subplanus, saepe obtuse umbonatus, viscidus, at centrum glaber, ad marginem fibrillosoareolatus; ad centrum "Warm Sepia" (sordide fulvus), tarde ("Sayal Brown") obscure cinnamomeus, tarde glabrescens. Contextus brunneus demum pallidus, fragilis, odor nullus, sapor mitis. Lamellae demum ventricosae, confertae, adnatae, demum obscure cinnamomeae. Stipes 3-7 cm longus, 4-7 mm crassus, pallidus deorsum brunnescens, fibrillosus, saepe subannulatus. Velum bicoloratum: cortina album, extus pallide argillaceum. Sporae 7-9 (10) x 4.5-5.5 μm, in "KOH" argillaceae, non dextrinoideae ovoideae vel ellipsoideae, subleves. Basidia tetraspora. Cheilocystidia 36-57 x 7-12 x 4-5 μm, fusoid-ventricosa, obtusa, rare clavata vel versiformes.

English translation: Pileus 2-4 cm broad, finally broadly convex or subapplanate, often obtusely umbonate, viscid, glabrous on the disc, fibrillose-areolate on the margin; “Warm Sepia” (dingy fulvous) on the disc, slowly (“Sayal Brown”) a dull shade of cinnamon, becoming glabrous in age. Context brown, finally pale, fragile, smell none, taste mild. Lamellae finally ventricose, crowded, adnate, finally dull cinnamon. Stipe 3-7 cm long. 4-7 mm thick, pale, discolouring brown downwards, fibrillose, often subannulate. Veil two-coloured: cortina white, pale argillaceous on the outside. Spores 7-9 (10) x 4.5-5.5 μm, argillaceous in "KOH", indextrinoid, ovoid or ellipsoid, almost smooth. Basidia four-spored. Cheilocystidia 36-57 x 7-12 x 4-5 μm, fusoid-ventricose, obtuse, rarely clavate or versiform.

Commentary: Based on molecular and morphological analysis, this is: = Hebeloma excedens (Peck) Sacc.

Full name: Hebeloma bicoloratum var. coloradense A.H. Sm., V.S. Evenson & Mitchel (1983)
Published: The Veiled Species of Hebeloma in the Western United States: 64 (1983)
Taxonomic status: Heterotypic synonym of H. velatum
Types: UNITED STATES: Colorado: Pitkin County, Elk Camp (approx. 39.1875°N, 106.9352°W, alt. approx. 3000 m a.s.l.) in coniferous, subalpine woodland under Picea sp., 29 Jul. 1979, A.H. Smith, H.D. Thiers (89594) (Holotype. herbarium acc. no. MICH 10734, HJB1000327).

Original diagnosis: Pileus 2-4 cm latus convexus demum plano-expansus, viscidus, pallidofibrillosus, glabrescens, griseus vel brunneogriseus ("Drab" vel "Wood Brown") tarde demum brunneo-cinnamomeus, ad marginem + appendiculatus. Contextus pallidus, odor et gustus subpungens (non raphaninus). Lamellae latae, confertae, adnatae, pallidae demum obscure cinnamomeae, non maculatae. Stipes 4-6 cm longus, 6-10 crassus, pallidus, fibrillosus, deorsum brunnescens. Sporae 8.5-11 x 5.5-6.5 (7) μm, ovoideae vel ellipsoideae vel in laterales subphasaeoliformes, non dextrinoideae. Cheilocystidia 34-75 x 4-7 μm, subclavata, filamentosa vel cylindrica vel fusoide-ventricosa.

English translation: Pileus 2-4 cm broad, broadly convex, finally applanate-expanded, viscid, with pale fibrils, becoming glabrous, grey or brownish-grey (“Drab” or “Wood Brown”), slowly brownish-cinnamon with age, more or less appendiculate along the margin. Context pale, smell and taste almost pungent (non-raphanoid). Lamellae broad, crowded, adnate, pale, finally dull cinnamon, not spotted brown. Stipe 4-6 cm long, 6-10 mm thick, pale, fibrillose, discolouring brown downwards. Spores 8.5-11 x 5.5-6.5 (7) μm, ovoid or ellipsoid or subphaseoliform in side-view, indextrinoid. Cheilocystidia 34-75 x 4-7 μm, subclavate, filamentous either cylindrical or fusoid-ventricose.

Commentary: Unfortunately we were unable to generate any DNA sequence data was generated but based on morphological analysis, this is: = Hebeloma velatum (Peck) Peck.