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
1
Observation was verified to research-grade status through community identification consensus on iNaturalist
2
Location confirmed as N Vanport Rd, Portland, Oregon, US
3
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.
description
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.
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.
