Daldinia singularis Y.-M. Ju, Vasilyeva, & J. D. Rogers



Daldinia singularis Y.-M. Ju, Vasilyeva, & J. D. Rogers, Mycotaxon 71: 405. 1999.

Stromata spherical to depressed-spherical, sessile to subsessile, solitary to aggregated, plane or with inconspicuous perithecial mounds, 3-5 mm diam x 2-4 mm high; surface dark reddish brown, blackened and dull in age; dull reddish brown granules immediately beneath surface, with KOH-extractable pigments purplish or without apparent KOH-extractable pigments; the tissue between perithecia brown, pithy to woody; the tissue below the perithecial layer composed of alternating zones, the darker zones dark brown, pithy to woody, 0.3-0.4 mm thick, the lighter zones gray or brown, pithy to woody, persistent, 0.2-0.4 mm thick.

Perithecia obovoid, 0.2 mm diam x 0.3-0.4 mm high.

Ostioles obsolete.

Asci 90-110 Ám total length x 6-7 Ám broad, the spore-bearing part 50-60 Ám long, the stipe 35-50 Ám long, with apical ring highly reduced or lacking, not bluing in Melzerĺs iodine reagent.

Ascospores light brown, unicellular, ellipsoid-inequilateral to reniform, with broadly rounded ends, 9-11 x 4.5-5.5 Ám, with straight germ slit much less than spore-length on more convex side; perispore indehiscent in 10% KOH, smooth; epispore smooth.