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Autumn Olive
Photo credit:  Nancy Loewenstein, Auburn University, retrieved from Bugwood.org (Image Number: 5306027), used under CC BY-NC 3.0 US, modified from the original

Common Name: Autumn Olive

Scientific Name: Elaeagnus umbellata

Habitat: Along streams, Ornamental

Provincial Designation: Prohibited Noxious

Prohibited Noxious weeds are plant species that are designated as "prohibited noxious" in the Alberta weed regulation. Prohibited noxious weeds must be destroyed, meaning all growing parts need to be killed or the plant's reproductive mechanisms need to be rendered non-viable.

Origin

Autumn Olive is native to Asia and was brought to North America. It has been grown as an ornamental shrub, for food and cover for livestock, and as a windbreak.

Legislated Because

Autumn Olive can grow into dense thickets and out-compete native vegetation. It also has nitrogen-fixing roots that can change the nutrient cycle in the soil making it difficult for native species that depend on poor soils to grow.

Description

Autumn Olive is a deciduous shrub that grows up to 4 m tall. The flowers are fragrant and have four white or light yellow sepals.

The characteristically silvery single leaves have smooth, wavy edges and are egg-shaped (2-7 cm x 1-2 cm). The branches have single thorns about 2½ cm long.  An important distinguishing characteristic is that shoots and young branches are clothed with very attractive white silvery scales which may disappear in the rain.

Autumn Olive fruits are 1 cm long, red and juicy with silver dots. The branches have single thorns and young twigs are silvery.

Can Be Confused With

Russian Olive - Elaeagnus angustifolia - introduced, more likely to have rusty scales on leaves and branches, berries more likely to be orangey-red.

Buffaloberry - Elaeagnus commutata - native shrub, usually smaller with more stems per plant, lots of rusty spots on the bottom of the leaf. 
 

Learn more about this species:

See Fact Sheets - Alberta Invasive Species Council

For More Information

Weed Management

Telephone

In Edmonton: 311

Outside Edmonton: 780-442-5311

Email invasiveweeds@edmonton.ca

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