Here's the CoL page showing that E. versicolor is a synonym:
http://www.catalogueoflife.org...
There is another possible explanation: Epimedium versicolor is not described as a hybrid taxon in the Catalogue of Life. Is it possible that there was an Epimedium versicolor and an Epimedium x versicolor? If so, the species is a synonym and the hybrid is not. The hybrid taxon, however, is not listed in any taxonomic database, which could mean that it's a man-made hybrid. Our database and the main taxonomic databases do not list hybrid taxa unless they are spontaneous hybrids that occur in the wild.
If the second explanation is correct, the man-made hybrid is not a valid species name and will not be listed in our database. In this case, the entry will have to be edited to leave only the genus and the cultivar name. Epimedium x versicolor can be added as an also-sold-as name.
