Also called Sambucus nigra subsp. canadensis.
Part of
elderberry genus Sambucus
in
moschatel family Adoxaceae.
Despite its common name, botanically, its fruit is not a berry,
but a
"drupe".
Native to 🇨🇦 🇺🇸 Canada and USA east of the 🗻︎ Rocky Mountains, through 🇲🇽 México to Central America.
🗺 Map by county (🇺🇸 USA-48),
🗺 map (North America, Central America). 
Uses by native peoples
(Ethnobotany database)
Most elderberry species produce edible 🍇︎ berries and juice (cooked, pulp and skin, no seeds nor stems). 😋︎ Yummy, even (this author recalls having eaten elderberry jam and wine — I did not then know to ask about which species).
But uncooked berries, and other plant parts (e.g., seeds, stems, and particularly roots and tender leaves), are ☠︎ toxic.
Make sure you learn the details!
🐝︎ Pollinators such as solitary cavity-nesting bees often make nests in this plant's old ⊚ pithy
stems.
In areas where this plant is native, this plant is among
the wet-loving (but terrestrial
) shrubs and trees planted to protect eroding streambanks, lakeshores, floodplains, stormwater detention ponds, road slopes and landslides, using a process called
live-staking.