CHAP. III. LINUM PERENNE. 91 



shall presently return. Differently from what occurs in 

 L. grandiflorum, the long-styled flowers have stamens 

 hardly more than half the length of those in the short- 

 styled. The size of the pollen-grains is rather variable ; 

 after some doubt, I have come to the conclusion that 

 there is no uniform difference between the grains in 

 the two forms. The long stamens in the short-styled 

 form project to some height above the corolla, and 

 their filaments are coloured blue apparently from ex- 

 posure to the light. The anthers of the longer stamens 

 correspond in height with the lower part of the stigmas 

 of the long-styled flowers; and the anthers of the 

 shorter stamens of the latter correspond in the same 

 manner in height with the stigmas of the short-styled 

 flowers. 



I raised from seed twenty-six plants, of which twelve 

 proved to be long-styled and fourteen short-styled. 

 They flowered well, but were not large plants. As I 

 did not expect them to flower so soon, I did not trans- 

 plant them, and they unfortunately grew with their 

 branches closely interlocked. All the plants were 

 covered under the same net, excepting one of each 

 form. Of the flowers on the long-styled plants, twelve 

 were illegitimately fertilised with their own-form pol- 

 len, taken in every case from a separate plant; and not 

 one set a seed-capsule: twelve other flowers were legi- 

 timately fertilised with pollen from short-styled flowers ; 

 and they set nine capsules, each including on an 

 average 7 good seeds, ten being the maximum number 

 ever produced. Of the flowers on the short-styled 

 plants, twelve were illegitimately fertilised with own- 

 form pollen, and they yielded one capsule, including 

 only 3 good seeds; twelve other flowers were legiti- 

 mately fertilised with pollen from long-styled flowers, 

 and these produced nine capsules, but one was bad; 



