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those of dwarf n°. 2 of 21 chromosomes, consequently of resp. 6 
and 3 chromosomes less than the nuclei of King of the Blues and 
Queen of the Pinks. Likewise the number of nucleoli in the nuclei 
of the dwarfs is smaller. The dimensions of the chromosomes and 
of the nucleoli have not altered. The cells of pleroma, periblema 
and dermatogen of the roots are strikingly small, notably those of 
dwarf n°. 1, which renders the determination of the number of 
chromosomes extremely difficult. 
From the above we may fairly conclude that the volume of these 
cells has relatively decreased much more than that of the nuclei, 
so that the difference between the magnitude of the cell and the 
nucleus of King of the Blues and of dwarf n°. 1 is not quite the 
same as R. Hrrtwie’s nucleus-plasma relation (1903). 
Stomata, pollengrains, cells of the leaf, the tepal and the bulb- 
scale have been measured and sketched by me. Every time the 
difference in the magnitude of the cells of the dwarfs and of King 
of the Blues and Queen of the Pinks revealed itself distinctly. 
This leads to two remarkable conclusions: The first is that it 
must be owing to the smaller magnitude of the subepidermal tepal- 
cells of the dwarfs that the dissolved anthocyanin is of a carmin-red 
tint instead of dark pink, as in Queen of the Pinks. The anthocyanic 
pigment will be of similar chemical composition, but in the tepals 
of the dwarfs it will be present in a higher concentration. The 
difference of tint is also very well distinguishable microscopically. 
The higher concentration of the anthocyanin in the dwarfs shows 
itself clearly in the cells of the outer bulb-scales, immediately after 
digging-time. Then the anthocyanin occurs in them in markedly 
plasmolyzed vacuoles or in greater and smaller conglomerates of 
crystals, as Moniscn (1905) pictures them of Pelargonium. It is evident, 
therefore, that in their smaller cells the dwarfs possess an amount 
of anthocyanin as great as that in the larger cells of Queen of the 
Pinks, so that the hereditary factors, which determine the chromogen 
and its oxydase for the two dwarfs and Queen of the Pink, are 
presumably identic. 
The second conclusion concerns the fertility of the pollengrains 
of King of the Blues, Queen of the Pinks and of the dwarfs. For 
several years in succession I found that King of the Blues and 
Queen of the Pinks have a percentage of sterile pollengrains, 
which, under seemingly normal circumstances, varies between 30 
and 50. Under similar conditions the percentage of sterile pollen- 
grains of dwarf N°. 1 is much smaller. It does not exceed 10 °/,. 
