Also called 🇨🇦 Canadian hemlock and Pruche du Canada.
Part of
hemlock genus Tsuga
in
🌲︎ cedar / fir / hemlock / larch / pine / spruce family Pinaceae
in
🌲︎ conifer order Pinales.
Native to 🇨🇦 Canada Great Lakes and Maritimes; and 🇺🇸 USA Great Lakes, New England and 🗻 Appalachia.
🗺 Map by county (🇺🇸 USA-48),
🗺 map (scroll down, on right),
🗺 map (North America, Central America), 
🗺 today + with climate change (eastern 🇺🇸 USA).
🌲︎ State tree of Pennsylvania.
In this area:
- do not move firewood (ever),
due to possible infestation by
hemlock woolly adelgid (HWA) Adelges tsugae.
Uses by native peoples
(Ethnobotany database)
Its bark was used to make tannic acid, to process hides for leather goods.
Some varieties[?] on No-Plant List by Seneca Nation of Indians. (page 65)
Tsuga hosts caterpillars of 110 species
of butterflies and moths, in some areas.
Growth and regeneration of this plant can be severely limited by large populations of
◼︎🦌︎ white-tailed deer Odocoileus virginianus.
(If needed, you can protect young hemlocks with a
🦌︎ deer-exclosure plant cage for areas of extreme predation.
)