Hypocreopsis rhododendri

On basidiomes of Hymenochaete corrugata.

Contextual hyphae densely compacted, multiform, cylindrical, short-septate, subglobose, vesiculose, very thick-walled, hyaline or with faint brownish intracellular pigment inside.

Asci cylindrical, uniseriate, up to 150 µm long, 10-15 µm wide, inamyloid in Melzer's reagent.

Paraphyses absent, but interascal pseudoparaphyses present, composed of cylindrical and flattened hyphae.

Ascospores globose to ellipsoidal, thick-walled and verrucose at maturity, with a tendency to adhere in short chains, strongly congophilic (staining deeply with Congo Red), containing abundant guttules of varying sizes inside.