or DIMOBPHIC AND TRIMOBPHIC PLANTS. 399 



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. 



Exp, XI. This long-styled plant produced a large crop of 

 capsules, and seemed to be one of the most fertile of the whole lot 

 of nineteen plants. The average from ten capsules was 35 '9 seeds, 

 with a maximum of 60 and a minimum of 8. 



Exp. XII. This and the following long-styled plant produced 

 very few capsules ; ten yielded an average of only 15'4 seeds, with 

 a maximum of 30 and a minimum of 4, 



Exp, XIII. This plant offers an anomalous case ; for it flowered 

 profusely, but produced very few capsules ; yet these capsules 

 contained numerous seeds. Ten capsules yielded an average of 

 71*9 seeds, with a maximum of 95 and a minimum of -29. Con- 

 sidering that this plant was illegitimate, and illegitimately fer- 

 tilized by its brother long-styled seedlings, the average and the 

 maximum are so remarkably high that I cannot at all understand 



the case. 



Class II. Illegitimate plants from the sltoH-styled form ^ fer- 

 tilized hi] pollen from the shorter stamens of the same form, 



I raised from this union nine plants, of which eight were short- 

 styled and one long-styled; so that there seems to be a strong 

 tendency with this form to reproduce, when self-fertilized, the 

 parent form ; but the tendency is not so strong as with the long- 

 styled. These nine plants never attained the full height of legi- 

 timate plants growing close to them. The anthers in many of 

 the flowers on several plants were contabescent. 



Exp, XIV. This short-styled plant was allowed during 1865 to 

 be freely and legitimately fertilized by illegitimate plants de- 

 scended from self-fertilized mid-, long- and short-styled plants. 

 Fifteen caj)sules yielded an average of 28*3 seeds, with a maximum' 

 of 51 and a minimum of 11. The seeds themselves were small 

 and irregular in shape ; hence this plant produced only 33 per 

 cent, of the proper number of seeds. Although so sterile on the 

 female side, none of its anthers were contabescent. 



Exp. XV. This short-styled -plant, treated like the last during 

 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 slaudard of fertilit}^ 



