Smooth Alder Alnus serrulata (Aiton) Willdenow  Synonyms: Hazel Alder.

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:

The leaf beetles Calligrapha alni and Calligrapha apicalis use Smooth Alder as a host plant.

There are 200 records in the project database.

View species at Maryland Plant Atlas

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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)

Smooth Alder (male catkins) in Prince George's Co., Maryland (2/24/2018). Photo by Bill Hubick. (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 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 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 (3/21/2018). Photo by Robert Warren. (MBP list)


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