Distribution: Occurring west of the Cascades crest in King County, where escaping from a wetland restoration planting. Great Lakes region east to the Atlantic Coast.
Habitat: Wetlands at low elevation.
Flowers: March-May
Origin: Introduced from Europe
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Wind
Multi-trunked trees to 20 meters tall.
Blades obovate to nearly orbiculate, 3--9 × 3--8 cm, margins often irregularly doubly serrate to nearly dentate, apex often retuse or obcordate, occasionally rounded; upper and lower surfaces heavily resin-coated.
Publication: Fruct. Sem. Pl. 2: 54. 1790.
PNW Herbaria: Specimen records of Alnus glutinosa in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Alnus glutinosa checklist entry
OregonFlora: Alnus glutinosa information
E-Flora BC: Alnus glutinosa atlas page
CalPhotos: Alnus glutinosa photos
