Identification help needed please

Identification help needed please

Observation - Identification help needed please. Description: This white flower with distinctively shaped petals was observed on 2.8.2011 in lLeicestershire, It was about 11 inches high growing in a fairly damp area of grass etc. It had only one small stem leaf, although the leaf illustrated was possibly growing fro

This white flower with distinctively shaped petals was observed on 2.8.2011 in lLeicestershire, It was about 11 inches high growing in a fairly damp area of grass etc. It had only one small stem leaf, although the leaf illustrated was possibly growing from the same rootstock.