Corylus cornuta is a shrub to 3 m tall, young twigs hairy, older twigs smooth.
Leaves alternate, oblong, coarsely double toothed, stalk hairy.
Flowers sexes separate on same plant (monoecious). Male catkin short, stalkless, female flowers red, small, March-April.
Fruit a nut enclosed in densely hairy bracts with long beak.
Wetland status: FACU-.
Frequency in NYC: Very infrequent.
Habitat: Moist woods, edges. Soil pH 6-7.5. Tolerant of shade. Moderately tolerant of drought, soil compaction. Intolerant of salt, flooding (Hightshoe 1988).