CHAP. V. HETEROSTYLED TRIMORPHIC PLANTS. 197 



this plant produced only 33 per cent, of the proper number 

 of seeds. The seeds themselves were small and irregular 

 in shape. Although so sterile on the female side, none 

 of the anthers were contabescent. 



Plant 15. This short-styled plant, treated like the last 

 during the same year, yielded an average, from fifteen cap- 

 sules, 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 con- 

 tabescent. 



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 

 parentage as the last three plants, when freely and legiti- 

 mately fertilised in 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 legiti- 

 mately 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 own-form 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 



