Land Plants - invasive

Poison Hemlock (Conium maculatum) on May 19, 2024

Submitter has sample
EDRR Status: Local expert notified

Description of specimen

10x10ft area with mature hemlock. Smooth, hairless stems with purple splotches.

Commentary

None

Resources

King County, WA: Poison Hemlock

Location

Just east of Butte Creek in what used to be a horse pasture on private property.

Expert Reviewer

Samuel Leininger
Clackamas Soil and Water Conservation District
4-County Cooperative Weed Management Area
Columbia Gorge Cooperative Weed Management Area

© 2025 Portland State University | Contact us for questions regarding site content