Land Plants - native

Cow Parsnip (Heracleum maximum) on Jun 1, 2026

Originally reported as Giant Hogweed (Heracleum mantegazzianum)

Submitter does not have a specimen

Description of specimen

Looks very much like the pictures I see online.

Commentary

None

Resources

Information on Cow Parsnip from iNaturalist and OregonFlora.

Location

We live in Pioneer Highlands and our lot backs against a green (natural) space where we found Giant Hogweed blooming today. We were advised not to touch it.

Expert Reviewer

Avatar of Reviewer

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

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