Host an Event Volunteer Join Tickets

Support the plant database you love!


Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or you can choose a plant family:

Alnus oblongifolia

Alnus oblongifolia Torr.

Arizona Alder

Betulaceae (Birch Family)


USDA Symbol: ALOB2

USDA Native Status: L48 (N)

Tall, straight-trunked tree with open, rounded crown.

This is one of the largest native alders and a handsome tree of rocky canyon bottoms. It is recognized by its smooth, dark gray bark. The soft wood is used as fuel.


From the Image Gallery

No images of this plant

Plant Characteristics

Duration: Perennial
Habit: Tree
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Leaf Shape: Elliptic , Lanceolate , Ovate
Leaf Venation: Pinnate
Leaf Margin: Double-serrate
Leaf Base: Cuneate
Leaf Texture: Leathery
Breeding System: Flowers Unisexual , Monoecious
Inflorescence: Catkin
Fruit Type: Samara
Size Notes: Height to 30 M.

Bloom Information

Bloom Color: Red , Green
Bloom Time: Mar , Apr


Native Distribution: SW. New Mexico and Arizona; local in N. New Mexico; also in N. Mexico; at 4500-7500' (1372-2286 m).
Native Habitat: Wet canyon soils in mountains and along streams.

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Alnus oblongifolia in USDA Plants
FNA: Find Alnus oblongifolia in the Flora of North America (if available)
Google: Search Google for Alnus oblongifolia


Record Modified: 2022-09-27
Research By: TWC Staff

Go back