146 .Uaz'isiii. 



flower and on tlie remaining seed-parents only harvested 

 tlie seeds from those flowers which opened after that 

 operation. 



The single sectorial plant of 1897 bore one flower 

 with one, and another with two red petals. Their seeds 

 were harvested sejxirately and sown. The other flowers 

 were pale; I also harvested their seed separately. The 

 flrst named seeds, naturally few in number, gave rise 

 in 1898 to about 40 i)lants which flowered; the latter to 

 200. In both groups the red stripes and sectors were 

 remarkably numerous in comparison with the previous 

 vear. At the end of July I found amongst the former 

 about 25%, and amongst the latter 23Yc sectorial plants. 

 Besides these, a plant bearing red flowers exclusively, 

 occurred in the former group. If I had repeated these 

 observations from time to time the two percentages would 

 of course have been considerably increased. But in order 

 to isolate the sectorial plants I pulled up all those which 

 up to that time had exhibited only few and narrow 

 stripes. As already mentioned, I harvested seed only 

 from the fruits of those flowers which had opened after 

 this operation. I saved two kinds of seed : one was from 

 a number of sectorial flowers which I had marked on a 

 large group of individuals ; the other was from a par- 

 ticularly striking plant which I had also marked, and 

 which had a fair number of sectorial and occasional per- 

 fectly red flowers, exhibiting also red bud-variations on 

 its lower branches. I harvested seeds only from the 

 narrow striped flowers of this plant. 



I have one more case of sectorial variation to men- 

 tion before I proceed to give the results obtained from 

 this harvest. A green lateral branch in an inflorescence 

 on an otherwise white or finely striped plant had a 



