Lesser Celandine (Ranunculus ficaria) on Mar 30, 2018
Submitter has sample
Description of specimen
It's lesser celandine.
Commentary
None
Remedy
For small patches, plants can be dug up in their entirety (be sure to get all roots and the small bulbils that break off to form new plants - you may need to sift through your soil to get these). Do not compost or put in your yard debris bin any below-ground parts of the plant (tubers and bulbils) as they can be spread this way. The leaves and flowers are ok to compost or put in yard debris. For larger patches, digging is impractical and can cause a lot of disturbance; herbicide application may have more success.
* Lesser Celandine: National Park Service fact sheet
*Lesser Celandine info from West Multnomah SWCD
Lesser celandine has completely covered my back yard at 9423 N Exeter.
Expert Reviewer
Mrs. Lindsey Wise Oregon Biodiversity Information Center, inr.oregonstate.edu/orbic Oregon iMapInvasives Institute for Natural Resources Portland State University