Viola tricolor seems to be the accepted name. I copied this from the ITIS website:
Results of: Search in every Kingdom for Scientific Name containing 'Viola tricolor'
Kingdom Plantae
Viola tricolor L. -- accepted -- johnny jumpup, pansy violet
Viola tricolor var. arvensis (Murr.) Boiss. -- not accepted
Disclaimer: ITIS taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. However, it is not a legal authority for statutory or regulatory purposes. While every effort has been made to provide the most reliable and up-to-date information available, ultimate legal requirements with respect to species are contained in provisions of treaties to which the United States is a party, wildlife statutes, regulations, and any applicable notices that have been published in the Federal Register. For further information on U.S. legal requirements with respect to protected taxa, please contact the U.S. Fish and Wildlife Service.
Date Generated:
Sat Dec 3 2011 11:45:48 MST