As a neophyte, Byron, I would love to see it arranged by genus, simply because I tend to get carried away and try germinating seeds of much too wide an area in the geophyte kingdom. I am not educated enough botanically to know where to look in a more systematic and scientific listing. But Narcissus and Nerine I know, though I would have to look up their families. So my personal vote is for genus, but my thinking vote is for whatever way you would like to do it. Shirley Meneice