Purple Moor-grass (Molinia caerulea) by lavateraguy at 11:08 pm 20/10/12

Confidence: It might be this.

Notes: This is not Deschampsia caespitosa (lacks the distinctive rough leaves). I though it might be Milium effusum, but as far as I know the infructescences of this don't close up after flowering. Of other woodland grasses, obviously not Bromopsis ramosa, Brachypodium sylvaticum or Schedonorus giganteus. I've seem Molinia caerulea on a variety of acid sites (moorland, lowland moss, acid woodland) and the shade forms do seem to be paler, but this was sufficiently lacking in colour that an identification as Molinia caerulea didn't come immediately to mind, but the habitat is reasonable for this species. (Or it could be one of the grasses that I can't identify.)