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thinleaf alder
Alnus incana ssp. tenuifolia
Fort Collins
- Synonyms
- Alnus tenuifolia
- Dimensions
-
Height: 15.0 ft. to 40.0 ft.
Spread: 15.0 ft. to 20.0 ft. - Growth Form
- Shrub, Tree
- Program Association
- Nature in the City
- Wildlife Uses
- Amphibians/Reptiles, Fish, Large Mammals, Medium-Sized Mammals, Pollinators/ Invertebrates, Riparian Birds, Shrubland Birds, Wetland Birds, Woodland Birds
- Sun Requirements
- Full Sun, Part Sun
- Water Requirements
- Moderate, High
- Plant Community
- Foothills, Mountains, Plains
- Season of Bloom
- April, May, June, July
- Flower Color
- Brown Shades, Red Shades
- Leaf Color
- Green Shades
- Aggressiveness
- Not aggressive
- Design Considerations
- Winter Interest
- Other Considerations
- Lifespan, No City Data
- Duration
- Perennial
- Natural Landscape Position
-
Fort Collins Model
3, 4, 5 - Soil Type
- Clay, Rocky, Sandy
- Pests/Disease Prone
- No
- Hazards/Toxic
- No City Data.
Notes
A small multi stem native alder that is best adapted to moist sites. Nice smooth grey bark and dark green foliage. Can handle some shade and does well against buildings. Tends to be short lived.
This is an important larval food host for many of our native invertebrates.
Flora of North America recognizes two subspecies of A. incana, both native to the United States. Subspecies rugosa is native to the northeastern U.S. and Canada and subspecies tenuifolia is native to the western U.S. including the Fort Collins area.