 Diplolepis rosae

Diplolepis rosae (Linnaeus, 1758) is a hymenopteran gall wasp which causes a gall known as the rose bedeguar gall, Robin's pincushion, or moss gall.The gall
develops as a chemically induced distortion of an unopened leaf axillary or terminal bud, mostly on field rose ("Rosa arvensis") or dog rose ("Rosa canina") shrubs.