Toxic invasive ragwort spotted growing along a Portland roadside
iNaturalist: mollycohn
Invasive Species
If you keep horses, goats, or cattle near Portland, this yellow-flowered weed can poison your pasture since it stays toxic even after it's cut and dried into hay.
Someone walking near N Vanport Rd in Portland spotted a patch of ragwort and logged it on iNaturalist, where other naturalists confirmed the identification. Ragwort looks cheerful with its clusters of small yellow flowers, but it's actually a listed noxious weed that contains liver-damaging compounds, dangerous to grazing animals and best pulled before it seeds.
Key Findings
Observation was verified to research-grade status through community identification consensus on iNaturalist
Location confirmed as N Vanport Rd, Portland, Oregon, US
Jacobaea vulgaris (ragwort) is classified as a noxious, livestock-toxic weed in the Pacific Northwest
chevron_right Technical Summary
A community scientist confirmed a ragwort sighting on N Vanport Rd in Portland, Oregon, adding a verified record of this toxic, invasive weed to public tracking databases.
Abstract Preview
Original paper
ragwort (Jacobaea vulgaris) observed in N Vanport Rd, Portland, OR, US
Research-grade observation of ragwort in N Vanport Rd, Portland, OR, US.
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Street trees cut heat deaths by 39 percent in European cities
Trees in your local park or street aren't just pretty — they are literally keeping people alive during heatwaves, and planting even a modest number of the ri...
Jacobaea vulgaris, synonym Senecio jacobaea, is a very common wild flower in the family Asteraceae that is native to northern Eurasia, usually in dry, open places, and has also been widely distributed as a weed elsewhere.