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Alnus incana rugosa (speckled alder)

Look for speckled alder along streams and rivers, and in marshy areas in the upper Midwest and eastern North America. It is a small tree with leaves that are both finely serrated and coarsely toothed. The bark is smooth and gray, and the female catkins are cone-like, becoming woody and remaining on the branches throughout the year. Speckled alder could be confused with smooth alder (with a range extending farther south, and leaves that are very finely serrated and not toothed), as well as green alder (with leaves that are shiny and sticky on their undersides). The western North American version of this tree species is thin-leaf alder.

Mycorrhizal mushrooms associated with speckled alder include Laccaria longipes, milky cap species, and species of Russula, among others. Saprobes include Callocybe fallax, Pholiota limonella, Pluteus leucoborealis, and others.

 

Range of Alnus incana rugosa

Alnus incana rugosa
streamsides and marshy areas are favored locations for speckled alder


Alnus incana rugosa
bark is brown when young . . .

 

Alnus incana rugosa
. . . maturing to gray and smooth, with blisters

 

Alnus incana rugosa
female catikins become woody and cone-like


Alnus incana rugosa
leaves are both finely serrated and broadly toothed . . .


Alnus incana rugosa
with shiny upper surfaces. . .

 

Alnus incana rugosa
. . . and dull, paler under surfaces with rusty hairs along the veins




Kuo, Michael (August, 2022). Alnus incana rugosa (speckled alder). Retrieved from the MushroomExpert.com website: www.mushroomexpert.com/trees/alnus_incana_rugosa.html

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