speckled alder Betulaceae Alnus incana ssp. rugosa (L.) Moench ssp. rugosa (Du Roi) R.T. Clausen Listen to the Latin symbol: ALINR Other Fact Sheets
Leaf: Alternate, simple, oval, doubly serrated, 2 to 4 inches long, dull dark green above, paler and may be velvety below.
Flower: Species is monoecious; in small clusters, preformed male catkins are 1/2 to 1 inch long, slender and green; females are much smaller, reddish green, open in early spring.
Fruit: Cone-like, 1/2 inch long, brown when ripe, each scale enclosing a very small winged seed, mature in late summer, and persistent
Twig: Moderate, gray-brown to reddish brown, velvety, lighter lenticels, buds stalked, plump and reddish brown.
Bark: Smooth reddish brown with numerous conspicuous horizontal white to light orange lenticels.
Form: Small clumping shrub that reaches 25 feet in height.

Looks like: thinleaf alder - hazel alder - Sitka alder
leaf flower fruit twig bark form1 map
Additional Range Information:
Alnus incana ssp. rugosa is native to North America.
Range may be expanded by planting.
See states reporting speckled alder.
External Links:
USDAFS Additional Silvics
USDA Plants Database
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Photos and text by: John Seiler,
Edward Jensen, Alex Niemiera,
and John Peterson
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