You selected Toxicodendron radicans var. rydbergii (Small ex Rydb.) Erskine. This is a synonym for:

Accepted scientific name:
Toxicodendron rydbergii (Small ex Rydb.) Greene (accepted name) 1 literature reference for Toxicodendron rydbergii (Small ex Rydb.) Greene
Synonyms:
Rhus radicans var. rydbergii (Small ex Rydb.) Rehd. (synonym) 2 literature references for Rhus radicans var. rydbergii (Small ex Rydb.) Rehd.
Rhus radicans var. vulgaris (Michx.) DC. (synonym) 2 literature references for Rhus radicans var. vulgaris (Michx.) DC.
Rhus toxicodendron var. vulgaris Michx. (synonym) 2 literature references for Rhus toxicodendron var. vulgaris Michx.
Toxicodendron desertorum Lunell (synonym) 2 literature references for Toxicodendron desertorum Lunell
Toxicodendron radicans var. rydbergii (Small ex Rydb.) Erskine (synonym) 2 literature references for Toxicodendron radicans var. rydbergii (Small ex Rydb.) Erskine
Infraspecific taxon: Toxicodendron rydbergii (Small ex Rydb.) Greene
Common names: -
Classification:
Plantae
Phylum Magnoliophyta
Class Magnoliopsida
Order Sapindales
Family Anacardiaceae
Genus Toxicodendron
Distribution: North America
Additional data: -
Source database: ITIS, Sep 2009
Latest taxonomic scrutiny: Kartesz J., 15-Mar-2000
Online resource: http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=28822
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:24936a3a-60a7-102d-be47-00304854f810:ac2010