I was interested in Theo Sanders piece about tetraploid N. b. graellsii crossing with standard daffodils. I wonder if he means all graellsii are tetra ploid or just the larger more robust clones? I tried these crosses for many years, without success.
In the past couple of years I’ve had several seedlings from a bulbocodium clone that I very naughtily call N. b. akersianus (because James Akers pointed me to it’s peculiar wet rushy habitat). It is very large, tall and robust & so I thought it might be a tetraploid. Some have green perianth segments that stay green throughout the life of the flower. It is a prolific seeder, and so I crossed it with’ Tropical Heat‘, optimistically hoping to get a sun-proof red cupped bulbocodium.
The ugly result can be seen in the pictures – the other seedlings are similar. Now I will try.
Brian
Brian,
in DaffSeek you find for N. b. graellsii that it is tetraploid with 28 chromosomes. I saw at sites near Madrid little plants only and no larger clones. It is very interesting that you are successful with crosses of N. b. akersianus x standard daffodils. Is it a clone of N. b. citrinus from the district near Bordeaux and are the seedlings fertile?
Theo