Chap. V. HETEROSTYLED TEIMOEPHIC PLANTS. 197 



the same year, yielded an average, from fifteen capsules, of 27 

 seeds, with a maximum of 49 and a minimum of 7. But two 

 poor capsules may be rejected, and then the average rises to 

 32 • 6, with the same maximum of 49 and a minimum of 20 ; so 

 that this plant attained 38 per cent, of the normal standard of 

 fertility, and was rather more fertile than the last, yet many of 

 the anthers were contabescent. 



Plant 16. This short-styled plant, treated like the two last, 

 yielded from ten capsules an average of 77 '8 seeds, with a 

 maximum of 97 and a minimum of 60 ; so that this plant 

 produced 94 per cent, of the full number of seeds. 



Plant 17. This, the one long-styled plant of the same parent- 

 age as the last three plants, when freely and legitimately ferti- 

 lised iu the same manner as the last, yielded an average from 

 ten capsules of 76 "3 rather poor seeds, with a maximum of 88 

 and a minimum of 57. Hence this plant produced 82 per cent, 

 of the proper number of seeds. Twelve flowers enclosed in a 

 net were artificially and legitimately fertilised with pollen from 

 a legitimate short-styled plant ; and nine capsules yielded an 

 average of 82 '5 seeds, with a maximum of 98 and a minimum 

 of 51; so that its fertility was increased by the action of 

 pollen from a legitimate plant, but still did not reach the normal 

 standard. 



Class IV. Illegitimate Plants raised from a Mid-styled 

 Parent fertilised with pollen from ownform longest 

 stamens. 



After two trials, I succeeded in raising only four 

 plants from this illegitimate union. These proved to 

 be three mid-styled and one long-styled ; but from so 

 small a number we can hardly judge of the tendency 

 in mid-styled plants when self-fertilised to reproduce 

 the same form. These four plants never attained their 

 full and normal height ; the long-styled plant had 

 several of its anthers contabescent. 



Plant 18. This mid-styled plant, when freely and legitimately 

 fertilised during 1865 by illegitimate plants descended from 

 self-fertilised long-, short-, and mid-styled plants, yielded an 

 average from ten capsules of 102*6 seeds, with a maximum of 



