Smooth Alder Alnus serrulata (Aiton) Willdenow    Synonyms: Hazel Alder.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Fagales   >   Family Betulaceae   >   Genus Alnus   

Status:

Smooth Alder grows in much of the eastern U.S. It often forms thickets, and is common along streams and on flood plains throughout Maryland (J. Hill/MNPS).

Relationships:

Host plant for the leaf beetles Calligrapha alni and Calligrapha apicalis.

There are 245 records in the project database.

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Smooth Alder in Garrett Co., Maryland (7/8/2012). Photo by Bill Hubick. (MBP list)

Smooth Alder in Allegany Co., Maryland (9/8/2012). The leaves on this particular alder are more obtuse than normal. Photo by Jim Brighton. (MBP list)

Young Smooth Alder cones in Idylwild WMA, Caroline Co., Maryland (6/30/2012). Photo by Jim Brighton. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (10/3/2010). Photo by Bill Harms. (MBP list)

The catkins of a Smooth Alder found growing in Worcester Co., Maryland (4/28/2012). Photo by Jim Brighton. (MBP list)

Smooth Alder (male catkins) in Prince George's Co., Maryland (2/24/2018). Photo by Bill Hubick. (MBP list)

Smooth Alder in Prince George's Co., Maryland (3/8/2015). Photo shows male catkins (drooping) and persistent winter fruit (cone shape). Photo by Robert Ferraro. (MBP list)

Smooth Alder catkins in Talbot Co., Maryland (2/19/2017). Photo by Jared Satchell. (MBP list)

Female Smooth Alder catkins in Frederick Co., Maryland (4/13/2015). Photo by Richard Orr. (MBP list)

Smooth Alder catkins in Howard Co., Maryland (4/12/2014). Photo by Joanne Solem. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (3/3/2012). Photo by Bill Harms. (MBP list)

Smooth Alder growing in Kent Co., Maryland (5/11/2016). Photo by Dan Small. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (10/3/2010). Photo by Bill Harms. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (10/3/2010). Photo by Bill Harms. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (10/3/2010). Photo by Bill Harms. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (2/12/2011). Photo by Bill Harms. (MBP list)

Smooth Alder growing in Kent Co., Maryland (5/11/2016). Photo by Dan Small. (MBP list)

Smooth Alder in Dorchester Co., Maryland (2/27/2016). Note small female flowers (red) on right, and large, yellowish, dangling catkin of male flowers on left. Photo by Jim Brighton. (MBP list)

Smooth Alder in Dorchester Co., Maryland (2/16/2020). Photo by Sue Muller. (MBP list)

Smooth Alder blooming in Frederick Co., Maryland (7/9/2017). Photo by Robert Warren. (MBP list)

A comparison of leaves of Smooth Alder (left) and Seaside Alder (right) in Wicomico Co., Maryland (6/17/2012). Photo by Bill Hubick. (MBP list)

A comparison of leaves of Smooth Alder (left) and Seaside Alder (right) in Wicomico Co., Maryland (6/17/2012). Photo by Bill Hubick. (MBP list)

A Smooth Alder in Howard Co., Maryland (4/19/2014). Photo by Joanne Solem. (MBP list)

Smooth Alder in Caroline Co., Maryland (2/20/2018). Photo by Wayne Longbottom. (MBP list)

Smooth Alder in Frederick Co., Maryland (1/9/2021). (c) johnbotany, some rights reserved (CC BY-NC). Photo by John Hall. (MBP list)

Smooth Alder in Frederick Co., Maryland (3/21/2018). Photo by Robert Warren. (MBP list)

Smooth Alder in Baltimore Co., Maryland (4/27/2020). (c) Peter M Martin, some rights reserved (CC BY-NC). Photo by Peter M Martin via iNaturalist. (MBP list)

Smooth Alder in Dorchester Co., Maryland (2/16/2020). (c) Judy Gallagher, some rights reserved (CC BY-NC). Photo by Judy Gallagher. (MBP list)

Smooth Alder in Prince George's Co., Maryland (3/15/2020). (c) Matthew Beziat, some rights reserved (CC BY-NC). Photo by Matthew Beziat via iNaturalist. (MBP list)


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