Antirrhinum Ma jus Striatum. 123 



striped plants exhibit a stronger tendency to prodnce 

 bnd-variations than the finely striped ones. 



Sectorial variation is very diverse in the manner of 

 its manifestation. I fonnd it as a rnle on the main stem, 

 bnt also on the branches. If the inflorescence is looked 

 at from above, i. e., in projection, one sector is red whilst 

 the rest is white. This red sector often consists of a 

 narrow red stripe only, or of one-half or three-quarters 

 of the whole. As a rule the abnormality extends from 

 the base to the top of the spike; but it may also be con- 

 fined to part of it, especially when it consists of a narrow 

 line only. A single red flower on an otherwise striped 

 spike is by no means a rare occurrence. On the borders 

 of the two sectors the flowers are often striped on one 

 side and red on the other. As in the case of bud-varia- 

 tions it is the coarsely striped individuals which are most 

 prone to the sectorial dissociation of color. 



The red color occurs not only on the corolla but also 

 on the stamens. In finely striped flowers the stamens 

 are, as a rule, yellow ; in flowers with broad stripes they 

 are striped or red. The individual stamens in the same 

 flower are usually dissimilar in respect to this character ; 

 yet it is difficult to find a strong contrast within a single 

 flower, e. g., a single stamen which is almost red, and 

 another nearly yellow. I have spent much trouble in 

 the attempt to find such flowers, especially in those that 

 had one longitudinal half almost or entirely without 

 stripes. But I did not discover any definite relation 

 between the striping on the stamens and that on the 

 corresponding parts of the corolla. 



As a matter of fact pure yellow flowers never occur in 

 this race. To a superficial observer it may seem as if 

 they were not rare and even that the red stripes may 



