Smooth Sumac, Western Sumac: Rhus glabra (Synonyms: Rhus borealis, Rhus calophylla, Rhus glabra var. cismontana, Rhus glabra var. laciniata, Rhus glabra var. ocidentalis)
Lemonade Sumac, Skunkbush, Skunkbush Sumac: Rhus trilobata (Synonym: Rhus aromatica ssp. flabelliformis, Rhus aromatica ssp. trilobata, Rhus aromatica var. flabelliformis, Rhus aromatica var. trilobata, Rhus trilobata var. trilobata, Schmaltzia trilobata)
Pacific Poison Oak, Pacific Poison-oak: Toxicodendron diversilobum (Synonyms: Rhus diversiloba, Toxicodendron radicans ssp. diversilobum)
Western Poison Ivy, Western Poison-ivy: Toxicodendron rydbergii (Synonyms: Rhus radicans, Rhus radicans var. rydbergii, Rhus radicans var. vulgaris, Rhus rydbergii, Rhus toxicodendron var. vulgaris, Toxicodendron desertorum, Toxicodendron radicans)