Unicorn Plant

Proboscidea louisianica

Unicorn Plant

Family: Martyniaceae

Weed class: monitor list
Native to: Parts of North America
Legal listings:

This plant is on the quarantine list. It is prohibited to transport, buy, sell, offer for sale, or distribute plants or plant parts of quarantined species into or within the state of Washington or to sell, offer for sale, or distribute seed packets of seed, flower seed blends, or wildflower mixes of quarantined species into or within the state of Washington. Please see WAC 16-752 for more information on the quarantine list. For questions about the quarantine list, contact the Washington State Department of Agriculture's Plant Services Program at (360) 902-1874 or email PlantServices@agr.wa.gov.


Why Is It a Noxious Weed?

This plant is on the monitor list - it is not a listed noxious weed in Washington. Please contact its sponsor Sharon Sorby to report locations or for more information.

How would I identify it?

For More Information

Invasive Plant Atlas information and images

Additional Photos