Epimedium x perralchicum 'Nachfolger'
28th April 2006
A modern German selection, for the moment I am going to take it on trust that this is correctly named.
8th April 2007
20th March 2009
18th April 2015
Barker, David G. - Epimedium and other herbaceous Berberidaceae, Hardy Plant Society, 1997
Stearn, William T. - Epimedium, 2002.