The fertility of species and named daffodils.
N. jonquilla henriquesii has been transformed from diploid to tetraploid. The pollen volume of the tetraploid plant is about two times bigger than that of the diploid plant and the pollen tubes have a much larger diameter. The tetraploid N.…
We are heading into mid-winter here but nevertheless there are plenty of daffodils. Bulbocodiums of course: Some nice tazettas – just. A cyclataz from N. cyclamineus x Autumn Colors: Some fertile viridiflorus hybrids: A ghostly Viriverse x N. dubius: I…
Crosses of different diploid and tetraploid poeticus varieties with N. tazetta were made before 1906 and 1930 especially in the Netherlands from J.B. van der Schoot. To the first group belong Jaune a Merville and Geranium with seven chromosomes from…
This is a better picture of Figure 3 (Hillstar x N. cyclamineus) of my article “Narcissus cyclamineus crosses and their fertility”. It is made in this spring at the field of Arno Kroon (Floratuin, Julianadorp). The seedling is pollen- and…
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…
Three weeks ago I saw that some new seedlings of jonquilla hybrids x viridiflorus hybrids growing outdoors had flower buds. Up to this time we had no frost, but soon it would freeze and snow and perhaps the flowers would be…