Chap. V. HETEKOSTYLBD DIMORPHIC PLANTS. 225 



species, but that some of the plants, when artificially 

 fertilised with their own pollen, yielded a moderate 

 supply of seed. He was so kind as to send me some 

 of these self-fertilised seeds, from which I raised the 

 plants immediately to be described. I may premise 

 that the results of my experiments on the seedlings, 

 made on a large scale, do not accord with those by 

 Mr. Scott on the parent-plant. 



First, in regard to the transmission of form and 

 colour. The parent-plant was long-styled, and of a 

 rich purple colour. From the self-fertilised seed 23 

 plants were raised ; of these 18 were purple of dif- 

 ferent shades, with 2 of them a little streaked and 

 freckled with yellow, thus showing a tendency to 

 reversion ; and 5 were yellow, but generally with a 

 brighter orange centre than in the wild flower. All 

 the plants were profuse flowerers. All were long- 

 styled ; but the pistil varied a good deal in length 

 even on the same plant, being rather shorter, or con- 

 siderably longer, than in the normal long-styled form ; 

 and the stigmas likewise varied in shape. It is, 

 therefore, probable that an equal-styled variety of the 

 primrose might be found on careful search; and I 

 have received two accounts of plants apparently in this 

 condition. The stamens always occupied their proper 

 position low down in the corolla ; and the pollen- 

 grains were of the small size proper to the long-styled 

 form, but were mingled with many minute and 

 shrivelled grains. The yellow-flowered and the purple- 

 flowered plants of this first generation were fertilised 

 under a net with their own pollen, and the seed sepa- 

 rately sown. From the former, 22 plants were raised, 

 and all were yellow and long-styled. From the latter 

 or the purple-flowered plants, 24 long-styled plants 

 were raised, of which 17 were purple and 7 yellow. 



