The Origin of Linaria Vulgaris Pcloria. 209 



numerable flowers with a single spur ; in the second year, 

 however, two appeared. I collected the seeds of these 

 plants in 1889. 



From this I raised the third generation in 1890. Here 

 again the plants did not flower till the second year, and 

 again there was one case of a Pcloria amongst thousands 

 of normal flowers. I harvested the fruits of this peloric 

 plant separately and it furnished me with sufficient seed 

 for the culture of 1892. 



This year I adopted the plan of sowing the seeds in 

 pans, containing good garden soil, in the greenhouse of 

 my laboratory. Hitherto I had simply sown the seed in 

 the bed, for which method, however, a much larger 

 quantity of seed is required. The seedlings were planted 

 out singly in pots containing richly manured soil as soon 

 as they began to develop a hypocotylous bud ; then they 

 were kept under glass, and were not transferred to the 

 open bed until June. The result was that they not only 

 flowered in the first year, but did so very luxuriantly. 

 There were about twenty individuals in all. On one 

 of these I saw a single peloric flower at the end of 

 August. In the autumn I pulled up all the plants except 

 two, one of which had exhibited the peloria. These two 

 plants flowered in the following year in complete isola- 

 tion, a profusion of flowers being borne on the freely 

 branched stems, but they did not then develop a single 

 peloric flower. They produced 13cc of seeds, an abun- 

 dant harvest. I sowed a small proportion of this in the 

 following year, and as it gave rise to the Linaria vul- 

 garis pcloria I was looking for, I sowed the rest in 1896, 

 and some again in 1899. 



Before we proceed to give an account of this main 

 section of the experiment let us briefly summarize the 



