Land Plants - non-native

Greater Celandine (Chelidonium majus) on Oct 6, 2015

Submitter has sample

Description of specimen

I found multiple individuals of Chelidonium majus. ID confirmed by D. Maze (city of Portland BES), Erin Riggs, & Jeff Lesh (Clackamas SWCD) by photo. 4 Flowering specimens were collected with seed pods. Mature plants had already released seed with numerous rosettes forming nearby.

Commentary

Control recommendations?

Reporter
Oct. 6, 2015, 11:38 a.m.

Hi, Chad. We haven't really had an occasion to manage greater celandine in Portland, or at least that I've ever heard, so I don't know exactly how to respond. If you're attending either the Herbicide Forum in December, or the Pull Together in February, we can see what sort of options make sense and what others might have tried.

Thanks for the report....

-Mitch

Mitch Bixby
Oct. 8, 2015, 3:29 a.m.

Location

Private residence(s). Near homes and along trails above Johnson creek. Steep slopes, rocky soils.

Expert Reviewer

Mr. Mitch Bixby
City of Portland - Bureau of Environmental Services (BES)

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