Epimedium sempervirens 'Mars'
16th March 2017
An unusual red flowered form of the species purchased from Japan and named by Dick Weaver in the USA.
11th May 2018
References:
Barker, David G. - Epimedium and other herbaceous Berberidaceae, Hardy Plant Society, 1997
Stearn, William T. - Epimedium, 2002.