Posted: 27/04/2014 at 20:50
They are promiscuous I have one that must be a cross. I have hederifolium, coum and cilicium as possible parents.
In theory hederifolium and coum aren't going to cross, National collection holder told me that, not close enough related and don't flower at the same time. The latter isn't totally true for mine, the hederifolium go on so long the coum have started sometimes.