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

Status:

Common along streams and river banks throughout Maryland. Smooth Alder often forms dense alder thickets in suitable habitats.

Relationships:

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

There are 298 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 growing in Kent Co., Maryland (5/11/2016). Photo by Dan Small. (MBP list)

Smooth Alder in Anne Arundel Co., Maryland (3/3/2012). 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 (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)

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


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