CHAP. V. HETEROSTYLED TRIMORPHIC PLANTS. 201 



mately fertilised by illegitimate plants, as described under 

 No. 22, and yielded an average, from eight capsules, of 

 122.5 seeds, with a maximum of 149 and a minimum of 

 84. Hence this plant exceeded the normal standard, pro- 

 ducing no less than 131 per cent, of seeds. 



CLASS VI. Illegitimate Plants raised from Mid-styled 

 Parents fertilised with pollen from the shortest sta- 

 mens of the long-styled form. 



I raised from this union twenty-five plants, which 

 proved to be seventeen long-styled and eight mid- 

 styled, but not one short-styled. None of these plants 

 were in the least dwarfed. I examined, during the 

 highly favourable season of 1866, the pollen of four 

 plants; in one mid-styled plant, some of the anthers of 

 the longest stamens were contabescent, but the pollen- 

 grains in the other anthers were mostly sound, as they 

 were in all the anthers of the shortest stamens; in 

 two other mid-styled and in one long-styled plant many 

 of the pollen-grains were small and shrivelled; and in 

 the latter plant as many as a fifth or sixth part ap- 

 peared to be in this state. I counted the seeds in five 

 plants (Nos. 26 to 30), of which two were moderately 

 sterile and three fully fertile. 



Plant 26. This mid-styled plant was freely and legiti- 

 mately fertilised, during the rather unfavourable year 

 1864, by numerous surrounding legitimate and illegitimate 

 plants. It yielded an average, from ten capsules of 83.5 

 seeds, with a maximum of 110 and a minimum of 64, thus 

 attaining 64 per cent, of the normal fertility. During the 

 highly favourable year 1866, it was freely and legitimately 

 fertilised by illegitimate plants belonging to the present 

 Class and to Class V., and yielded an average, from eight 

 capsules, of 86 seeds, with a maximum of 109 and a mini- 

 mum of 61, and thus attained 66 per cent, of the normal 

 fertility. This was the plant with some of the anthers of 

 the longest stamens contabescent as above mentioned. 

 15 



