254 A - B - St °UT Cytologia 3 



Jive seedlings with somatic number of 22, 

 two with somatic number of 22-23, 

 two ,, ,, ,, ,, 22-24, 



one ,, ,, ,, ,, 26-27, and 



one ,, ,, ,, ,, 21-28. 



Of the seedlings having the Europa Daylily as a pollen parent 

 and thus far studied— 



nine seem very constant for the number 22, 



one gives counts of 20-21 with also numbers rising to more 



than 40, 

 one gives counts of 29-32, and 

 one gives numbers of 31-33. 



Eleven seedlings having the triploid Maculata Daylily as one parent 

 have been examined— 



ten are quite regular for the number, 22, and 

 one has numbers as high as 33. 



Of the seedlings which have triploid double-flowered daylilies as a 

 pollen parent and diploid plants as seed parents— 



eight are apparently rather uniformly diploids, 



one gives counts of which the numbers 12, 15, 22 and 23 



seem definite, and 

 one appears to be triploid. 



The evidence seems to indicate rather definitely that for the triploid 

 daylilies the gametes which function in fertilization most frequently 

 carry 11 chromosomes but that the number in such gametes may vary 

 and rise to at least 22. In only one or two seedlings is there evidence 

 that the most frequent somatic number may be less than 22. When 

 the range in the somatic number of chromosomes is 12-23, 21-28, and 

 31-33 it is not certain what numbers were in the gametes that entered 

 into the fertilizations. 



It may be stated that in every case the Fi seedlings obtained by 

 fully controlled cross-pollination between the Europa Daylily and non- 

 fulvous daylilies, such as H. flava, H. citrina, and H. Thunbergii, 

 either as a seed or as a pollen parent have all had flowers with some 

 degree of fulvous coloring. This does not agree with the results 

 reported by Blaringhem (1928) to the effect that Fi hybrids of similar 

 crosses may have yellow flowers. 



