Clarkia I'ulchclla. 145 
for instance, whole or half petals; I shall therefore call 
such flowers and plants sectorial. 
In 1896 I had a bed of about 50 plants all of the 
flowers of which were whitish. The majority bore no 
red stripes, or only such fine ones and so rarely that they 
were oyerlooked, which is always possible since the plants 
produce very many and rapidly fading flowers. Only 
one plant stood out amongst the rest ; at the end of July 
it bore a flower with two red petals and at the beginning 
of August a petal the middle third of which was also 
colored red. Otherwise, the bed was practically white 
throughout the summer. Some of the seed of the whites 
was saved. 
From the seeds of a white flowered specimen I ob- 
tained in 1897 a culture of about 100 plants. Amongst 
these again there was only one sectorial example ; I saved 
its seeds separately although it had been fertilized by 
insects in the midst of the others. In the majority of 
these others I had not seen red stripes, but on a few of 
them there had been some insignificant ones. 
The seeds of the pale flowered plants gave rise to a 
generation equally poor in stripes ; in 1898 I only saw one 
striped one amongst 30. This race therefore remained 
poor in red sectors as a result of a continued selection 
of almost white plants. 
From the seeds of the sectorial plant I at once ob- 
tained a race which was rich in red petals and red sec- 
tions of petals, and often produced whole red flowers 
and twigs with red flowers only (Bud-variation). I 
grew it for two generations (1898 and 1899). The seeds 
for the first were gathered in 1897 from a seed-parent 
which had not been isolated; in 1898, however, I pulled 
up all of the non-sectorial plants whilst they were in 
