Harold, The two bigger pollen grains of your photo could be viable and perhaps unreduced or unreduced and doubled. The method of causing the pollen to sprout, and examining it under a microscope has been described by Lawrence Trevanion in “A Look at…
Author: Theo Sanders
New viridiflorus hybrid
N. cantabricus from Spain x Emerald Sea
New site
You will find some information about hybridizing on my new site http://www.theo-sanders-daffodils.de. The document ‘Pollen Volume and Chromosome Content of Daffodils; Possibilities for hybridizing’ you perhaps already know. The other two pdf-documents ‘Crosses of Standard Daffodils with Species’ are transformed from…