The sexual stage is a very small (< 1mm) orange disc or lens shaped fungus with a paler margin, found in clusters on dead nettle stems.    The asexual stage is more often recorded, and precedes the sexual stage.  This asexual stage is poorly defined and cushion-shaped, ofen coalescing, and is a darker orange.  It produces chains of cylindrical conidia.

Photograph on host plant; note substrate and associated plant species; note whether you are recording sexual or asexual stage, or both

Dead stems of nettle