[Wildflowers with 5 Petals in the Cascade Mountains of Oregon and Washington]

The Sumac Family in the Cascade Mountains of Oregon and Washington

Anacardiaceae

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

Fall color of poison oakat left from Crawford Oaks, Columbia Hills Historical State Park.......2013. The photo at right shows the fruits of of poison oakat left from Crawford Oaks, Columbia Hills Historical State Park........October 31, 2020.

Sumac: The Genus Rhus -

Poison Ivy and Poison Oak: The Genus Toxicodendron -

Paul Slichter E-mail