About Scarlet Oak at OSU's Landscape Plants site
Native to the eastern U.S.
Height can exceed 150’, more often not so tall.
Leaves have pointy lobes (5-7) and deep, C-shaped sinuses; glossy green above and paler beneath.
Acorns are ovoid, 0.5-1”, cup goes halfway down.
Fall foliage is scarlet.
Uncommon in Portland.