Russulales » Stereaceae » Dextrinocystidium

Dextrinocystidium sacratum

Dextrinocystidium sacratum (G. Cunn.) Sheng H. Wu 1996, in Wu, Mycologia, 886-890 (1995).

Diagnosis: Basidiomata resupinate, effuse, subceraceous or ce- raceous. Hymenial surface pale pink, smooth, cracked. Dimitic. Generative hyphae simple-septate. Subiculum thin, with compact texture; hyphae colorless, usually glued together, 2-3 µm diam, thin- or slightly thick-walled. Subhymenium distinctly thickening, with compact texture. Skeletal hyphae occasionally branched, colorless, 3-4 µm diam, thick-walled, nonamyloid, nondextrinoid. Lamprocystidia numerous, overlap- ping in context, colorless, subulate, 30-50 x 7-12 µm (with encrustation), with 0.5-1.5 µm thick walls, dextrinoid and cyanophilous. Gloeocystidia rare, cylindrical, flexuous, colorless, 25-45 x 3.5-6.5 µm, thin-walled. Basidia utriform, 35-40 x 6.5-8.5 µm, slightly thick-walled, four-sterigmate. Basidiospores broadly ellipsoid, adaxially slightly concave, verrucose (smooth in KOH), slightly thick-walled, 8.5-10.5 x 5.7-7 µm (in KOH), amyloid.

Index Fungorum Number: IF414845

 

Figures 1.5-1.11. Dextrinocystidium sacratum (holotype). 1.5 Subicular generative hypha. 1.6 Occasionally branched skeletal hyphae. 1.7 Lamprocystidia. 1.8 Gloeocystidia. 1.9 Basidia. 1.10 Basidiospores (in IKI). 1.11. Basidiospores (in KOH). Scale bar =10 µm.

 

Reference:

Wu, S. H. (1995). Two new genera of corticioid basidiomycetes with gloeocystidia and amyloid basidiospores. Mycologia, 886-890.

 

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