Albomagister, Sánchez-García, Birkebak & Matheny

Matheny, P. Brandon, Lebeuf, Renée, Sánchez-García, Marisol, Graddy, Mary G., Trudell, Steven A., Wood, Michal G. & Vellinga, Else C., 2024, Four new species of Albomagister (Agaricales) from eastern North America, Botany 102 (9), pp. 355-365 : 363-364

Key to species of Albomagister from North America and Europe

1. Pleurocystidia present and conspicuous, basidiomes tricholomatoid or inocyboid ………… 2

1 Ɩ. Pleurocystidia absent, basdiomata inocyboid or nearly mycenoid and fragile ………… 6

2. Basidiomes with gray to blackish scales ………… A. griseosquamosus

2 Ɩ. Basidiomes fibrillose, felty, or smooth, without scales; white ………… 3

3. Basidiospores indistinctly amyloid or a small proportion dextrinoid, a small proportion thick-walled, known only from Europe ( France, Corsica) ………… A. alesandrii

3 Ɩ. Basidiospores inamyloid, non-dextrinoid, and thin-walled; known only from eastern North America ………… 4

4. Pileus with underlying grayish drab tones when fresh, basidiospores 5–7 × 4–5 µm ………… A. Leucoloma

4 Ɩ. Pileus without grayish drab tones, spores 4–6 × 3.5–4 µm ………… 5

5. Stipe 1–6 mm wide, habit inocyboid resembling Inocybe geophylla ………… A. luteifolius

5 Ɩ. Stipe 5–10 mm wide, habit tricholomatoid resembling small forms of Tricholoma columbetta ………… A. subaustralis

6. Basidiospores 5–6–× 4–5.5 µm, thin-walled, not dextrinoid; in acidic cove hardwood forests in eastern North America (southern Appalachians) ………… A. parviniveus

6 Ɩ. Basidiospores 6–6.5 × 4–6 µm, a small proportion with thickened dextrinoid walls, under Buxus in Europe ( France) ………… A. virgineus