[The Sumac Family West of the Cascade Mountains of Oregon and Washington]

Poison Oak, Pacific Poison-oak, Pacific Poison Oak

Toxicodendron diversilobum

Synonyms: Rhus diversiloba, Rhus radicans ssp. diversilobum

Poison Oak, Pacific Poison-oak, Pacific Poison Oak: Toxicodendron diversilobum (Synonyms: Rhus diversiloba, Rhus radicans ssp. diversilobum) - Poison Oak, Pacific Poison-oak, Pacific Poison Oak: Toxicodendron diversilobum (Synonyms: Rhus diversiloba, Rhus radicans ssp. diversilobum)

A close-up of the shiny, trifoliate leaf of pacific poison oak as seen along the trail to Upper Table Rock, several miles north of Medford, OR........April 4, 2009.

Poison Oak, Pacific Poison-oak, Pacific Poison Oak: Toxicodendron diversilobum (Synonyms: Rhus diversiloba, Rhus radicans ssp. diversilobum)

Pacific poison oak as seen along Deer Creek at Star Flat, west of Selma, OR.....April 22, 2021.
Paul Slichter