Rose Gall - Diplolepis rosae Castle Crags State Park, Shasta County, California, USA June 28, 2016
Several of these conspicuous galls were growing on a California Wild Rose (Rosa californica). They are caused when the female wasp Diplolepis rosae lays its eggs in the leaf buds of the rose.
Contributed by R.J. Adams on 6 July, 2016 - 12:22am |