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Alnus serrulata (Aiton) Willd.

Smooth alder, hazel alder

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionMagnoliophytaFlowering plants, also known as angiosperms
ClassMagnoliopsidaDicotyledons—plants with two initial seed leaves
SubclassRosidaeRoses, legumes, proteas, dogwoods, hydrangeas, mistletoes, euphorbias, grapes, many more
OrderFagalesBirch, she-oak, beech, walnut, bayberry, others
FamilyBetulaceaeBirch family: birches, alders, hazels, hornbeams and hop-hornbeams
GenusAlnusThe classical Latin name for this genus
SpeciesserrulataMinutely serrate

About plant names...

Smooth alders are usually small, somewhat disheveled-look­ing trees, with many trunks and branches that form a nearly impenetrable thicket. As a group, alders' most prominent feature is the small cone-like fruits, which remain on the tree through the winter. They are common at the edge of water, and in areas that are wet in the spring.

 

Alnus serrulata (smooth alder, hazel alder)

4/27/2023 · Mitchell Field, Harpswell, Maine

Alnus serrulata (smooth alder, hazel alder)

9/25/2010 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts · ≈ 6 × 4″ (15 × 10 cm) ID is uncertain

Species"Cones"Flowers LeavesTrunk
Alnus serrulata On long thin stalks, ½-⅝″ (1.3-1.6 cm) longBright yellow in spring, male catkins green-brown, female flowers about ½″ (1.3 cm) 2-4″ (5-10 cm), rounded edges or small serrations, dark green above, paler and with fine hairs belowSpeckled with horizontal lens-shaped spots, up to 20′ (6.1 m)
Alnus incana ssp. rugosa On short stalksMale flowers 2½-5″ (6.3-12 cm) long, hanging downward, female flowers about ½″ (1.3 cm) around Oval-shaped, 2½-5″ (6.3-12 cm) long, 2-4″ (5-10 cm) wideSpeckled with horizontal lens-shaped spots
Alnus viridis Bunched upMale flowers about 2″ (5 cm), female flowers point up, about ½″ (1.3 cm) Relatively large serrationsHas diamond-shaped patches

Online References:

Www.carolinanature.com

The Virginia Tech Department of Forest Resources and Environmental Conservation

Plants.ces.ncsu.edu

The Lady Bird Johnson Wildflower Center

Plants for a Future, a resource and information centre for edible and otherwise useful plants

EFloras

References:

Sibley, David Allen, The Sibley Guide to Trees, Alfred A. Knopf, 2009, pp. 159-165

Little, Elbert L., National Audubon Society Field Guide to North American Trees, Eastern Region, Alfred A. Knopf, 1980, p. 363-4

Alnus serrulata (smooth alder, hazel alder)

8/6/2017 · Andres Art Institute, Big Bear Mountain, Brookline, New Hamp­shire · ≈ 6 × 4″ (16 × 11 cm)

Alnus serrulata (smooth alder, hazel alder)

8/6/2017 · Andres Art Institute, Big Bear Mountain, Brookline, New Hamp­shire · ≈ 6 × 4″ (15 × 10 cm)

Alnus serrulata (smooth alder, hazel alder)

8/6/2017 · Andres Art Institute, Big Bear Mountain, Brookline, New Hamp­shire · ≈ 6 × 4″ (14 × 10 cm)

Alnus serrulata (smooth alder, hazel alder)

4/27/2023 · Mitchell Field, Harpswell, Maine

Alnus incana (L.) Moench var. serrulata (Aiton) B. Boivin

Alnus noveboracensis Britton

Alnus serrulata (Aiton) Willd. var. subelliptica Fernald

 

Alnus serrulata description by Thomas H. Kent, last updated 14 Sep 2023.

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Alnus serrulata (smooth alder, hazel alder)

9/25/2010 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts · ≈ 5 × 3½″ (13 × 9.2 cm) ID is uncertain

Alnus serrulata (smooth alder, hazel alder)

12/23/2009 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts · ≈ 15 × 10″ (37 × 25 cm)

Alnus serrulata (smooth alder, hazel alder)

8/6/2017 · Andres Art Institute, Big Bear Mountain, Brookline, New Hamp­shire · ≈ 6 × 4″ (15 × 10 cm)

Alnus serrulata (smooth alder, hazel alder)

9/25/2010 · Nashua River Rail Trail, Groton Center, Groton, Mass­a­chu­setts · ≈ 4 × 6″ (10 × 15 cm) ID is uncertain

Range:

About this map...