Small white, long-stemmed cups with smooth inner surface and dense cylindrical hairs on the margins and exterior, which are quite long in proportion to the cup. 

A large and difficult genus - there are other white Lachnum species

Photograph on host plant; note substrate and associated plant species.  We recommend that this is identifed by an expert, from a specimen, before submission to NatureSpot; microscopic examination may be needed

On dead wood and woody debris.