Bur Oak, Mossycup Oak         KWER-kus ma-kro-CAR-pa

• Deciduous tree, 70-80 ft (21-24 m) height, similar or greater spread, developing into an oval form with a massive trunk and stout branches.  Bark dark gray to gray-brown, becoming deep ridged and furrowed.  Leaves alternate, simple, 10-25 cm long, about half as wide, obovate to oblong-obovate, generally cuneate base, shape variable, often with a broadly expanded toothed portion above 2 deep notches and a lower portion with a few short, rounded lobes, other leaves with 7-9 deep lobes (resembling white oak), upper surface glossy green, pale and hairy below.  Autumn color yellow-green, yellow, and yellow-brown. Fruit (acorn) solitary, 2-4 cm long, enclosed more than half by a deep cap which is conspicuously fringed.
• Sun, difficult to transplants.  Very adaptable to various soil conditions and fairly tolerant of urban conditions.
• Hardy to USDA Zone 3      Native range from Nova Scotia to Pennsylvania, west to Manitoba and Texas.
• macrocarpa: with large fruit
• Corvallis: in the parking strip on the north side of Harrison Ave. west of 14th St.