Corresponding author: Viktor Papp (
Academic editor: Dmitry Schigel
Due to their bluish basidiocarps the
Based on the bluish tints of the basidiocarp and the lack of the chlamydospores in culture,
Based on microscopic characters and host preference
Previously in Hungary, only two species were known within the
The basidiocarps (Fig.
Basidiocarp annual, up to 3(–5) cm, white or cream color with bluish-grey tint. Pileus surface azonate, glabrous or slightly tomentose, but not fairy. Pores roundish, 4–5/mm. Context whitish, not zonate, soft when fresh, hard when dried. Hyphal system monomitic. Hyphae with clamp connections, thin- to thick-walled, 2.6–4.2 μm wide. Some contextual hyphae with finger-like branches. Cystidia absent and no cystidioles. Basidia clavate with 4 sterigmata and basal clamp, 10.2–15.6 μm. Basidiospores mostly allantoid, thin walled, 4.7–5.6 × 1.1–1.4 μm.
1 | Basidiospores 1.5–2(2.2) μm wide, occurs on conifers or hardwoods |
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– | Basidiospores up to 1.5 μm wide, occurs mainly on hardwoods |
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2 | Pore surface vivid yellow, basidiospores (4.5–)4.7–6.3(–6.5) × (1.5–)1.6–1.9(–2) μm (Q = 3.03–3.15), growing on |
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– | Bright yellow color not present |
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3 | Mediterranean species, basidiocarps small size (up to 25 mm long), lightly greyish-blue when bruised, hyphae in pileipellis are encrusted, basidiospores (4,25–)4.7(–6.12) × (1.45–)1.5(–1.68) μm (Q = 3.2), occurs on conifers and hardwoods |
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– | Wide spread species, basidiocarps larger (up to 6 cm long), upper surface tomentose to hairy, strongly bluish when bruised, basidiospores (4.4–)4.5–5.8(–6) × (1.3–)1.5–1.8(–2) μm, occurs mainly on conifers |
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4 | Basidiocarps orbicular, small, up to 4(5) cm, upper surface matted, or with very low tomentum, not hairy |
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– | Basidiocarps wide, larger, usually more than 5 cm, upper surface hairy |
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There are many difficulties related to the identification of the species of the
Anatomical structure of
Contextual hyphal system;
Hyphae from dissepiments edge;
Basidia;
Basidioles;
Basidiospores.
Cross-section of the basidiocarp of
Cross-section of the basidiocarp of