Epimedium x youngianum 'Capella'
Description – E. x youngianum is a cross between E. grandiflorum and E. diphyllum, both species being native to Japan. This hybrid has occurred in the wild where the two species grow in close proximity, and in gardens and nurseries. The various varieties of this cross tend to be small to medium sized deciduous plants carrying medium sized flowers. These vary widely in colour and shape. Sometimes the shape tends towards E. grandiflorum, but others have quite different flowers unlike either parent. This one seems to tend towards the E. diphyllum parent.
We bought this only recently and therefore not had it long enough to fully appraise, but we have been impressed so far.