The plants in the pictures are composed of one-third standard daffodil, one-third N. cyclamineus, and one-third N. jonquilla in the first and N. viridiflorus in the second case. They are triploid with three different chromosome sets and should therefore be infertile. But 10% of the pollen and the egg cells of the first variety are viable and from the second one 10% of the pollen grains sprout. This behaviour made me look closer at ‘Narcissus cyclamineus crosses and their fertility’. It is the title of the enclosed pdf file Narcissus cyclamineus crosses and their fertility. The paper can also be found on www.theo-sanders-daffodils.de.
Theo
Theo, thank you for posting this interesting paper. It should be very helpful to other hybridizers. And I enjoyed your photos of your successes.
Thanks Theo. Really nice flowers.
fernandesii x cyclamineus has give some nice flowers for me and some of these have some fertility. I crossed these with Viriquilla and Viriverse. Hopefully some will flower in the coming season.