It may also be a vibirnum. Opulus for example has "similar" blooms. VBs are hardy to z4-ish.
NB covers z6 thru z3 so some areas (z6 for example) would be ok for macs, especially rebloomers. Or nonrebloomers might be ok in colder NB zones (6, 5) with winter protection.
Or better yet, paniculatas or arborescens (Annabelle-like hydrangeas, some of which hace lacecap blooms). These two are very cold hardy!
Qf blooms may be a tad variable in form (not perfectly identical from, say, "regular" Qf to another Qf or to Little QF. The blooms can be messy, disorganized looking too. 😊
