These apothecioid ascomata are gregarious, superficial but perhaps erumpent, and colonise the underside of overwintered Ligustrum ovalifolium leaves. They are very exiguous and measure 100-200 microns in diameter; sessile, initially very shortly cupulate, later flattened to become convex and pulvinate and possess abundant and conspicuous excipular hairs with several septa, the base of which arises from a pigmented vesicular cell and the ends with an hyaline and obtuse apex. Their walls are not smooth but slightly roughened, as if encrusted, but not truly warty like those of the genus Cistella. The excípulum has an angularis or prismatica texture with angular or more or less rectangular cells, with the walls provided with a yellowish-brown pigment.
The 8-spored asci are clavate, with a base without croziers and a probable apical pore with no reaction in IKI. The ascospores are hyaline and smooth, cylindrical, with a fine guttular content. I envisage two genera for this ascomycete: Cistella and Psilachnum, although I am more inclined to the latter as the hairs do not have distinctly warty walls.
What do yo think?