Phylum: Ascomycota Family: Helotiaceae
Crocicreas cyathoideum (Bull.) S.E. Carp.
Very common on dead stems of herbaceous plants throughout the year
References:
Dennis, R.W.G. (1978) British Ascomycetes
Ellis, M.B. & Ellis, J.P (1997 new enlarged edition) Microfungi on Land Plants: An Identification Handbook