Very interesting! You summarized it very well. Did he happen to mention anything about color, whether one parent would be more dominant that the other? I know we discussed this some time ago, but our discussion concluded it would most likely be a simple blending.
I strongly agree agree with lower germination temperatures for lilium. That's why in many of my pictures you'll see my (sometimes dirty) seed pots in a room with a white carpet even--because it's the only place in the house that has a good spot where I can hold 65-68'F temperature consistently. I have to admit I learned that one the hard way. And the fact he mentions even lower temperatures for interdivisionals is very good, valuable information to know.
Very good notes, Rick. Thanks for sharing them.
