146 
flower and on the remaining seed-parents only harvested 
the 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 separately and sown. The other flowers 
were pale; I also harvested their seed separately. The 
first named seeds, naturally few in number, gave rise 
in 1898 to about 40 plants which flowered; the latter to 
200. In both groups the red stripes and sectors were 
remarkably numerous in comparison with the previous 
year. At the end of July I found amongst the former 
about 25%, and amongst the latter 23^ 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 
