These galls are caused by tiny aphids. Their host is Witch Hazel (Hamamelis virginiana).
They are easily recognizable by a red conical gall structure. This gall, which are rich in nutrients, provide both food and shelter for the female aphid.
Spotted growing on witch hazel leaves in a mixed forest.
Lat: 41.89, Long: -73.49
Spotted on Jun 24, 2018
Submitted on Jun 26, 2018