Some of you may know that Epimedium grandiflorum nanum is an exquisite miniature form of this popular species where the new foliage is fresh green, less than an inch across, and broadly edged in maroon, and the milky white flowers, despite the tiny size of the plant, are normal size. The whole thing is only a couple of inches tall. Sadly it also has a reputation for being difficult to keep - I've had it and lost it twice. This is why I was so pleased when I came across this at Marchant's Hardy Plants a few years ago.
Its a bit bigger than nanum - about 5ins high but more vigorous and easy to keep. In every other respect it seems identical.
It is still slow to increase though so I'll only ever have a few small plants to sell.