DESCRIPTION: Measuring up to 20mm across the gall caused by the larva of a midge takes the form of a rosette-shaped growth that remains on the host plant throughout the winter.  The gall consists of from thirty to sixty leaves, shortened and crowded together. Inside each gall is a central chamber that contains a pink or red larva. There are likely to be several similar species galling different Salix host species and closer investigations are needed. DISTRIBUTION: Widespread throughout Britian but, as with many galls it is possibly under-recorded. HABITAT: Found on the terminal buds of various Willows.