Notes

Key Characteristics

Opposite, simple leaves, 5-lobed with narrow tipped teeth
Petioles and buds exude a milky sap when cut, the terminal buds are broad and blunt with yellowish green or red scales, strongly keeled
The samaras are large with widely diverging wings - up to 180 degrees
These medium to large trees cast very dark shade, and are spotted during late summer by a fungus that looks like burn spots on the leaves
Bark is tight, looking like an overcooked hot dog

Sourced from a field lab in Fall 2011