The leaves of the Mimosa pudica close quickly when touched. Its flowers have 10 or fewer stamens. What appears to be a single globular flower is actually a cluster of many individual ones.
Photo # 3 of Gall Aceria theospyri also posted separately to observation https://www.inaturalist.org/observations/209137830
I forgot to post this one!
I remembered Stephen was looking for caterpillar but didn't see any.