Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Rosids: Fabids: Fagales
WEAKLEY'S FLORA (4/24/22):
Alnus glutinosa
FAMILY
Betulaceae
NEW! Click to go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
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.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_alal7_001_lvd
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USDA-NRCS PLANTS Database / USDA Wetland flora: Field office illustrated guide pnd_algl2_003_lvd
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Zelimir Borzan, University of Zagreb, Bugwood.org bug_1379012
Month Unknown
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Robert Vidéki, Doronicum Kft., Bugwood.org bug_5398732
Month Unknown
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Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5448631
Month Unknown
)
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.
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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.
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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.
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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.
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Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5448690
Month Unknown
)
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.
WEAKLEY'S FLORA (4/24/22):
Alnus glutinosa
FAMILY
Betulaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Alnus glutinosa
FAMILY
Betulaceae
SYNONYMOUS WITH
Flora of North America
Alnus glutinosa
59
Tree
Perennial
Monoecious
Non-native: Europe
Habitat: Disturbed areas, suburban woodlands, per Weakley's Flora
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
This plant may be causing problems in natural areas outside its native range, according to authorities such as:
LEAVES:
Deciduous
Simple
Alternate
FLOWER:
Spring
Unisexual
Staminate calyx 4-parted, pistillate calyx absent
Petals absent in pistillate flowers
4 stamens in staminate flowers
Inferior ovary
Flowers in catkins (staminate catkins elongate)
FRUIT:
Spring?
TO LEARN MORE about this plant, look it up in a good book!
- Invasive Plants, Guide to Identification, Impacts and Control p101
- Woody Plants of the Southeastern US: A Winter Guide p054