Clarkia Pnlchclki. 147 
narrow red longitudinal line on it which was not much 
broader than a flower stalk and extended over four inter- 
nodes. The upper, lower, and middle flowers of the 
tract stood on this line ; the two former were completely 
red, the middle one only partly so. The two flowers oc- 
cupying intermediate positions but on the green side of 
the branch were almost white. 
The culture of 1899 was richer in sectorial plants 
than that of 1898, as the isolation of the seed-parents 
would have led us to expect. From the mixed seeds 
referred to above, I had about 300 plants of which five 
were wholly red whilst the proportion of sectorial ones 
was 40%. The single selected seed-parent, however, 
gave rise to only 50 offspring which flowered, of which 
one was red, whilst the proportion of sector ials mounted 
to 70% . The average number of reds in the two cultures 
was 1-2% ; and that of sectorial plants 45%. 
These experiments show that the pale flowered plants, 
selected as seed-parents, give rise to a fairly constant 
progeny amongst which the proportion of sectorial plants 
is quite small. 
The progeny of sectorial plants, on the other hand, 
consists of about 45% broadly striped and 1-2% red 
plants, the remainder being pale tinged with red, or at 
any rate very poor in stripes. 
The cultures of the pale flowered plants are ordinarily 
in flower some weeks before the first stripes appear; but 
in the beds of sectorial plants the red may be seen among 
the very first flowers. Here also the white flowered ones 
are always in a large majority ; among a thousand flowers 
of this race I counted 34 striped and 8 sectorial ones, 
that is to say only 4% altogether. 
