UW Burke Herbarium species comparison

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Alnus glutinosa

Alnus oblongifolia

Black alder, European alder
Habit Multi-trunked trees to 20 meters tall.
Leaves

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.

Alnus glutinosa

Alnus oblongifolia
Flowering time March-May
Habitat Wetlands at low elevation.
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.
[WildflowerSearch map]
[BONAP county map]
[WildflowerSearch map]
[BONAP county map]
Origin Introduced from Europe
Conservation status Not of concern
Sibling taxa
A. incana, A. rhombifolia, A. rubra, A. viridis
A. glutinosa, A. incana, A. rhombifolia, A. rubra, A. viridis
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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