OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Fagales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Alnus glutinosa   FAMILY Betulaceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Alnus glutinosa   FAMILY Betulaceae

SYNONYMOUS WITH Flora of North America

Alnus glutinosa

 

COMMON NAME:
Black Alder, European Alder


         To see larger pictures, click or hover over the thumbnails.

image of Alnus glutinosa, Black Alder, European Alder

USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913    pnd_alal7_001_lvd

        

image of Alnus glutinosa, Black Alder, European Alder

USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide    pnd_algl2_003_lvd

        

image of Alnus glutinosa, Black Alder, European Alder

Zelimir Borzan, University of Zagreb, Bugwood.org    bug_1379012

Month Unknown        

image of Alnus glutinosa, Black Alder, European Alder

Robert Vidéki, Doronicum Kft., Bugwood.org    bug_5398732

Month Unknown        

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org     bug_5448631

Month Unknown        

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org     bug_5448637

Month Unknown        

Male catkins appear in fall; female appear in spring before leaves emerge, per Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007).

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org     bug_5448656

Month Unknown        

Bark becomes dark gray, scaly, per Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004).

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org    bug_5448675

Month Unknown        

Leaves of native alders tend to have pointed ends, these are rounded, per Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007).

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org     bug_5448689

Month Unknown        

Sticky ("glutinosa") young twigs & leaves distingush it from native alders, per Invasive Plants, Guide to Identification, Impacts and Control (Kaufman & Kaufman, 2007).

image of Alnus glutinosa, Black Alder, European Alder

Leslie J. Mehrhoff, University of Connecticut, Bugwood.org     bug_5448690

Month Unknown        

image of Alnus glutinosa, Black Alder, European Alder

T. Davis Sydnor, The Ohio State University, Bugwood.org    bug_5495389

Month Unknown        

The straight trunk and narrow crown are unlike any native eastern alder, per Woody Plants of the Southeastern US: A Winter Guide (Lance, 2004).

 

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Alnus glutinosa   FAMILY Betulaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Alnus glutinosa   FAMILY Betulaceae

SYNONYMOUS WITH Flora of North America
Alnus glutinosa

 

Find by SCIENTIFIC NAME:

59

Tree
Perennial
Monoecious

Habitat: Disturbed areas, suburban woodlands, per Weakley's Flora

Non-native: Europe

map
CLICK HERE to see a map, notes, and images from Weakley's Flora of the Southeastern US.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)


Invasive?

This plant may be causing problems in natural areas outside its native range, according to authorities such as:

 

LEAVES:
Deciduous
Simple
Alternate

FLOWER:
Spring
Staminate calyx 4-parted, pistillate calyx absent
Petals absent in pistillate flowers
4 stamens in staminate flowers
Inferior ovary
Unisexual

Flowers in catkins (staminate catkins elongate)

FRUIT:
Spring?

 

TO LEARN MORE about this plant, look it up in a good book!



 


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