Based on our results Hyaloscyphaceae s.str. embraces Hyalo­scypha, Eupezizella, Olla, Mimicoscypha and Resinoscypha. In addition, several species currently accepted in Hyalopeziza belong to this clade. The genera included have hyaline or whitish to greyish apothecia, and they all have hairs, which are often dextrinoid. The hair morphology varies, from cylindrical to tapering, from aseptate to multiseptate, as well as ranging from thin-walled to thick-walled or to solidified (‘glassy’). The ectal excipulum is of predominantly thin-walled textura pris­matica, which is occasionally dextrinoid or has small amyloid inclusions.

Hyaloscypha and Eupezizella both have aseptate apothecial hairs, but in Eupezizella the hairs are always blunt and are never dextrinoid. The occasional amyloid nodules in the excipulum of Eupezizella have not been observed in Hyaloscypha. The latter character is shared with some of the other members of Hyaloscyphaceae s.str. (e.g., Mimicoscypha). Eupezizella is highly supported as a sister group to Hyaloscypha.

ETYMOLOGY: The generic name refers to association of the fruitbodies with roots.

Associated with plant roots, mycorrhizal; apothecia discoid, stipitate; ectal excipulum of textura prismatica, with or without short hyphal protrusions on receptacle surface; medullary excipulum of textura intricata; asci inoperculate, 8-spored, cylindric-clavate, J+ in Melzer's reagent; ascospores ellipsoid to elongate-ellipsoid, unicellular; paraphyses filiform.