Alnus rugosa
Tag alder · also Grey alder, Speckled alder
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Alnus rugosa, commonly known as tag alder, is a multi-stemmed, shrubby tree in the birch family. It tolerates wetter soils and can spread slowly by runners, often found in swamps and wetlands, across cooler parts of the Northern Hemisphere.
Where it grows
Trees in each city's inventory, with the share of that city's named trees this species accounts for.
- 940.03%—2.4 in
- 680.04%—3.0 in
- 30.00%—2.0 in
No city in this list records planting dates for this species, so age is blank throughout.
Traits
- Form
- Multi-trunk
- Foliage
- Deciduous
- Growth rate
- Slow
- Soil
- Wet-tolerant
- Water needs
- High
- Blooms
- Mar, Apr, May
Trunk diameters across every city: median 3.0 in, mean 6.2 in, 90th percentile 18 in. Measured at breast height, as published by each inventory.
Native range
Terrestrial ecoregions where this species is native. Trees in the dataset mostly stand well outside it.
Temperate Broadleaf & Mixed Forests
- Eastern Canadian Forest-Boreal transition
- Eastern Great Lakes lowland forests
- New England-Acadian forests
- Western Great Lakes forests
Other Alnus in the catalogue
18 of the top 2,000 species are in this genus.
