Mountain alder
- Latin name: Alnus incana ssp. tenuifolia (Nutt.) Breit.
- French name: Aulne à feuilles minces
- Synonym(s): Thinleaf alder
-
Taxonomic Serial Number: 181889
19477 [syn. A. tenuifolia Nutt.]
Description
Leaves
Form
- Thinner and smoother than speckled alder
- Veins not impressed into the upper surface
Buds
Form
- Fine hairs
Colour
- Bright red
Twigs
Form
- Slender, hairy
Colour
- Light green
Flowers
Form
- Mature seed catkins in groups of 2–5 on slender stalks
Length
- 9–13 mm
Structure
- Monoecious
Bark
Form
- Not as conspicuously marked with lenticels as speckled alder
- With age becoming scaly
Colour
- Grey or reddish-grey
Size
Height
- To 10 m
Habitat
Site
- Stream banks
Insects and mites
Insects that cause damage to this tree.
-
Poplar-and-willow borer
Scientific name: Cryptorhynchus lapathi (Linnaeus).
Foliage or buds
-
Ceanothus silk moth
Scientific name: Hyalophora euryalis (Walker)
- Eulithis destinata (Moesch)
- Eupithecia subfuscata (Haworth)
- Hydriomena irata Swett
-
Northern tent caterpillar
Scientific name: Malacosoma californicum pluviale (Dyar)
-
Pero moth
Scientific name: Pero morrisonaria (Hy. Edwards)
-
Poplar-and-willow borer
Scientific name: Cryptorhynchus lapathi (Linnaeus).
-
White slaut
Scientific name: Tetracis cachexiata (Guenée)
-
Whitetriangle leafroller
Scientific name: Clepsis persicana (Fitch)
Roots, bark, stem or trunk, or branches
Diseases caused by pathogens
Diseases caused by pathogens that cause damage to this tree.
Roots, bark, stem or trunk, or branches
Distribution map
