genus
Alders
Alnus
Field notes
Children
- Common Alder introduced
- Grey Alder native
- Red Alder native
- Green Alder native
- Smooth Alder native
- White Alder native
- Andean Alder present
- Iberian Alder
- Italian Alder introduced
- Manchurian Alder present
- Formosan Alder present
- Arizona Alder present
- Nepal Alder present
- Mexican Alder present
- Japanese Alder
- Montane Alder
- Seaside Alder native
- Alnus rohlenae
- Alnus × spaethii
- Hybrid Alder
- Alnus trabeculosa
- Drooping Alder
- Alnus serrulatoides
- Alnus × fallacina
Range
Greener is more native, amber more introduced; paler is less certain. How this was decided
Key traits
- Layer
- Trees
From USDA PLANTS.
Top native alders All
Native to the US, ranked by caterpillars, then bees and other hosts, food, flowers and shelter.
-
Grey Alder
Alnus incana
caterpillars
272
hosts
15
food
62
flowers
4
-
Green Alder
Alnus alnobetula
caterpillars
228
hosts
5
food
41
flowers
6
-
Smooth Alder
Alnus serrulata
caterpillars
183
hosts
4
food
29
flowers
8
-
Red Alder
Alnus rubra
caterpillars
179
hosts
7
food
22
flowers
8
-
White Alder
Alnus rhombifolia
caterpillars
124
hosts
7
food
16
flowers
5
shelter
1
-
Seaside Alder
Alnus maritima
caterpillars
93
hosts
2
food
11
flowers
3