Hello jwalker
Nobody seems to seriously reply to your post, so i will try to answer you a bit.
From what i know, it can take hundreds of germinations before the selection of a special seedling. From my opinion, its a matter of luck.
Here some h.collina x elongata seeds i sprouted recently. All the germinations occur in the same 4-5 days, and the left one is clearly different; all green, upright and very slow grower compared to others.
I pollinate a lot of flowers from many species/cultivars in the last few months, i hope for more special seedlings!
For the wistuba's cultivars, some sources said he collected them in the wild, shipped the plants to germany and received them when he is back in town. Some other sources said he made the selection in his lab. I asked him the question last year, and he said he selected them himself in germany. For myself, i trust him, i think he sprout these beauties himself. But its a very personnal opinion.
H.minor 'selection 1'
H.minor 'burgundy-black'
H.minor 'big orange'
H.minor var pilosa (clone B)
H.minor var pilosa (clone A)
I know, i know, pilosas was clearly collected in the wild, but they are minors, and the variation is amazing and interesting
So, i hope i answer your thread at least a little bit !
Francois