Chap. V. HETEEOSTYLED TEIMOEPHIC PLANTS. 195 



Plant 8. This plant was allowed to be freely fertilised in 1864 

 by legitimate and illegitimate plants of the other two forms, 

 and ten capsules yielded on an average 41-1 seeds, with a 

 maximum of 73 and a minimum of 11. Hence this plant pro- 

 duced only 44 per cent, of the full complement of seeds. 



Plant 9. This long-styled plant was allowed in 1865 to be 

 freely fertilised by illegitimate plants of the other two forms, 

 most of which were moderately fertile. Fifteen capsules yielded 

 on an average 57 • 1 seeds, with a maximum of 86 and a minimum 

 of 23. Hence the plant yielded 61 per cent, of the fuU comple- 

 ment of seeds. 



Plant 10 This long-styled plant was freely fertilised at the 

 same time and in the same manner as the last. Ten capsules 

 yielded an average of 44 '2 seeds, with a maximum of 69 and a 

 minimum of 25 ; hence this plant yielded 47 per cent, of the 

 full complement of seeds. 



The nineteen long-styled plants of the third lot, of 

 the same parentage as the last lot, were treated dif- 

 ferently ; for they flowered during 1867 by themselves 

 so that they must hare been illegitimately fertilised 

 by one another. It has already been stated that a 

 legitimate long-styled plant, growing by itself and 

 visited by insects, yielded an average of 21 ■ 5 seeds 

 per capsule, with a maximum of 35; but, to judge 

 fairly of its fertility, it ought to have been observed 

 during successive seasons. We may also infer from 

 analogy that, if several legitimate long-styled plants 

 were to fertilise one another, the average number of 

 seeds would be increased; but how much increased 

 I do not know ; hence I have no perfectly fair standard 

 of comparison by which to judge of the fertility of the 

 three following plants of the present lot, the seeds of 

 which I counted. 



Plant 11. This long-styled plant produced a large crop of 

 capsules, and in this respect was one of the most fertile of 

 the whole lot of nineteen plants. But the average from ten 



