Kellv: Astvlis Phlox 



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PROGENY OF AN ORBICULARIS PLANT 



Figure 3. Each of the twenty-six flowers is typical of the plant from which it came. 

 Note practical absence of anthocyan color in the four astylis flowers. In this family the 

 small-eyed and the astylis plants (if astylis were not self -sterile) would be expected to 

 breed true, whereas the progeny of the orbicularis plants would split up again in the 

 next generation much as has been the case above. 



study have long been in pedigree cul- 

 tures of the writer and have never been 

 known to throw anything but small- 

 eyed plants. 



It seems, therefore, that the astylis 

 condition is dependent on a single 

 recessive gene for its manifestation. 

 There is a group of associated charac- 

 ters apparently due to this single fac- 

 tor. When in homozvgous condition 



there follows an inhibition or loss of 

 the style, reduction of the stigmatic 

 branches, increase in the relative diam- 

 eter of the corolla lobes, ruffling of 

 corolla lobes, and decrease in the size 

 of the flower. The existence of the 

 large-eyed condition is due to this astyl- 

 is gene in heterozygous condition. It 

 converts the small-eyed flower into the 

 large-eyed kind by limiting the develop- 



