Hazel Alder (Alnus serrulata) is a native tree in Maryland (Deciduous). The sections below summarize where it grows, how to recognize it, and how it supports local ecosystems.
Habitat and range
Shrubby thickets along streams, seeps, and headwater wetlands throughout much of Maryland.
Identification
Toothed leaves with fine hairs; male catkins and woody cones on same plant; often forms dense clumps.
Soil and moisture
Wet acidic soils; tolerates scouring and seasonal high water.
Wildlife value
Cover for songbirds; catkins provide early pollen; fixes nitrogen improving riparian soils.
Uses and significance
Streambank stabilization and wetland buffers; naturalistic screening in wet sun.