Index / Search / Alnus incana ssp. tenuifolia
§1 Plant
Alnus incana (L.) Moench ssp. tenuifolia (Nutt.) Breitung
vernacular thinleaf alder — subspecies · Betulaceae
§2Habit & range
Habit and range
- Growth habit
- Shrub, Tree
- Duration
- Perennial
- Group
- Dicot
- Family
- Betulaceae Gray
- Genus
- Alnus
§2a
Native status, by region
- AK Alaska Native
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 214 counties across 12 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Low
- Shade
- Medium
- Moisture use
- High
- Fire
- Medium
- Salinity
- None
- Anaerobic
- High
- CaCO₃
- None
- Hedging
- Medium
§3b
Climate & soil
- Cold tolerance
- -62 °F minimum
- Frost-free days
- 130 min.
- Precipitation
- 10–20 in/yr
- pH range
- 5.5–7
- Root depth
- 18 in min.
- Fertility need
- Medium
- Soil texture
- coarse, medium
§3c
Form & growth
- Growth form
- Thicket Forming
- Growth rate
- Rapid
- Lifespan
- Moderate
- Mature height
- 20 ft
- Height @ 20 y
- 20 ft
- Foliage texture
- Medium
- Foliage colour
- Dark Green
- Porosity (summer)
- Moderate
- Porosity (winter)
- Moderate
- Flower colour
- Purple
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- Medium
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Early Spring
- Seed abundance
- High
- Seed begins
- Summer
- Seed ends
- Fall
- Spread rate
- Moderate
- Stratify
- Yes
- Seeds / lb
- 675,000
- Propagation
- seed, bare root, container
§3e
Use & availability
- Commercial availability
- Routinely Available
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Lumber
- No
- Fuelwood
- Low
- Christmas tree
- No
§4Counties, by state
Recorded in 214 counties across 12 states/territories.
Alaska view state ↗ 16 N ▾
- Anchorage 02020
- Bethel 02050
- Bristol Bay 02060
- Chugach 02063
- Copper River 02066
- Dillingham 02070
- Fairbanks North Star 02090
- Haines 02100
- Juneau 02110
- Kenai Peninsula 02122
- Lake and Peninsula 02164
- Matanuska-Susitna 02170
- Nome 02180
- Northwest Arctic 02188
- Southeast Fairbanks 02240
- Yukon-Koyukuk 02290
Arizona view state ↗ 8 N ▾
California view state ↗ 27 N ▾
- Alpine 06003
- Amador 06005
- Butte 06007
- Calaveras 06009
- Colusa 06011
- El Dorado 06017
- Fresno 06019
- Glenn 06021
- Humboldt 06023
- Lake 06033
- Lassen 06035
- Mariposa 06043
- Mendocino 06045
- Modoc 06049
- Mono 06051
- Nevada 06057
- Placer 06061
- Plumas 06063
- Shasta 06089
- Sierra 06091
- Siskiyou 06093
- Tehama 06103
- Trinity 06105
- Tulare 06107
- Tuolumne 06109
- Ventura 06111
- Yuba 06115
Colorado view state ↗ 30 N ▾
- Alamosa 08003
- Archuleta 08007
- Boulder 08013
- Chaffee 08015
- Clear Creek 08019
- Conejos 08021
- Custer 08027
- Delta 08029
- Dolores 08033
- Douglas 08035
- El Paso 08041
- Gilpin 08047
- Grand 08049
- Gunnison 08051
- Jackson 08057
- La Plata 08067
- Larimer 08069
- Mesa 08077
- Mineral 08079
- Montezuma 08083
- Montrose 08085
- Pitkin 08097
- Pueblo 08101
- Rio Blanco 08103
- Rio Grande 08105
- Routt 08107
- Saguache 08109
- San Juan 08111
- Summit 08117
- Teller 08119
Idaho view state ↗ 32 N ▾
- Ada 16001
- Adams 16003
- Bannock 16005
- Bear Lake 16007
- Benewah 16009
- Blaine 16013
- Boise 16015
- Bonner 16017
- Bonneville 16019
- Boundary 16021
- Butte 16023
- Caribou 16029
- Cassia 16031
- Clark 16033
- Clearwater 16035
- Custer 16037
- Elmore 16039
- Franklin 16041
- Fremont 16043
- Gem 16045
- Idaho 16049
- Kootenai 16055
- Latah 16057
- Lemhi 16059
- Lincoln 16063
- Nez Perce 16069
- Owyhee 16073
- Power 16077
- Shoshone 16079
- Teton 16081
- Valley 16085
- Washington 16087
Montana view state ↗ 12 N ▾
Nevada view state ↗ 7 N ▾
New Mexico view state ↗ 12 N ▾
Oregon view state ↗ 27 N ▾
- Baker 41001
- Clackamas 41005
- Columbia 41009
- Coos 41011
- Crook 41013
- Deschutes 41017
- Douglas 41019
- Gilliam 41021
- Grant 41023
- Harney 41025
- Hood River 41027
- Jackson 41029
- Jefferson 41031
- Josephine 41033
- Klamath 41035
- Lake 41037
- Lane 41039
- Linn 41043
- Malheur 41045
- Marion 41047
- Morrow 41049
- Umatilla 41059
- Union 41061
- Wallowa 41063
- Wasco 41065
- Washington 41067
- Wheeler 41069
Utah view state ↗ 17 N ▾
Washington view state ↗ 18 N ▾
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/ALINT ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/2876460 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z