Flowers - In dense upright clusters at branchlet tips; sexes in separate flowers usually in same flower cluster; flowers are small, pale yellowish green; appear after leaves in late May to early June.
Fruit - Samaras, often brilliant red; wings 2 -3 cm long, with acute angle (less than 90 degrees) between them; seed portion indented on 1 side; mature in late summer.
Habitat - Well-drained, moist soils along streams, in ravines and on moist hillsides in eastern forests; common on recently cut-over forest land and at high elevations.