Also called Fagus sylvatica atropunicea.
A variety, subspecies or form of
🇪🇺 European beech Fagus sylvatica,
which is part of
beech genus Fagus
in
beech / oak family Fagaceae
in
bayberry / beech / birch / oak / walnut order Fagales.
If the scientific botanical third name is capitalized and surrounded by single-quotes (e.g., Fagus sylvatica 'Purpurea' or 'Atropunicea'),
then this is cultivar.
This variety (or subspecies, form or cultivar) is often used in landscaping, having leaves that are not
▲▲ toothed,
but
♒︎ undulate,
and leaf colors=purple, bronze or burgundy for the whole growing season (half our staff) or for first half of the growing season (the other half of our staff — we will ground-truth next summer!). This is due to a mutation (genetic defect) in the coding for the plant's chlorophyll, that allows red light to be reflected or transmitted, instead of being absorbed and used for photosynthesis.
[citation needed]
The cultivar ranges from 🇪🇺 Europe into 🇹🇷 Türkiye (Turkey).
Uses by native peoples
(Ethnobotany database)
On No-Planting List by Seneca Nation of Indians SNI. 
(page 62)
Residents of eastern 🇨🇦 🇺🇸 North America may wish to replace this tree with their
native alternative
American beech Fagus grandifolia.