Land Plants - invasive

Italian Arum (Arum italicum) on Jun 8, 2018

Submitter does not have a specimen
EDRR Status: Local expert notified

Description of specimen

I have found three plants in my yard and my neighbor has one plant in her front yard and multiple in their back yard. I have also noticed new small starts trying to take hold in the easement along the side of my house along Glenn Oak Road. (The is a green space behind my house)


Greetings Carla,

Thank you for reporting the Italian arum to the Oregon Invasive Species Hotline. Italian arum is not a state-listed noxious weed in Oregon but it is considered invasive in our area.

This invasive weed has only recently been listed in Washington state, and as such, there is very little control information associated with it.

Preliminary herbicide trials have not yielded good results, so at this point, we recommended physical remove of the bulbs and disposal as trash.

Following removal, you can expect to see some resprouts, but keep digging out the bulbs and you will exhaust the plant. Diligence is key, to ensure success.

For more information, I recommend checking out the Washington State Noxious Weed Control Board website for more information (

Good luck in all your efforts and please feel free to contact me if you have questions.




Samuel Leininger
WeedWise Program Manager
Clackamas Soil & Water Conservation District
221 Molalla Ave. Suite 102
Oregon City, OR 97045
C: 503-998-2574

Samuel Leininger
June 28, 2018, 11:14 a.m.