448 Tricotylous Races. 



harvested and examined the seeds for each indivicUial 

 branch separately. Only slight differences were pre- 

 sented by the values obtained, and I shall therefore only 

 give the means. T determined the values of the inflores- 

 cences of the main stem and found the average to be 

 38% ; for the strong lateral stems produced from the 

 axils of the rosette (see Fig. 55, Vol. I, p. 302) I found 

 it to be 45% ; for the upper branches of the stem (see 

 Fig. 49, Vol. I, p. 282), however, 47% (calculated from 

 24 determinations), and for the lower branches of the 

 stem, which in :;his species tend to be very much weaker, 

 52% (in eight counts). The distribution of the differ- 

 ences, therefore, was different from what would have 

 been expected. They show that in this case, the harvest 

 from the primary inflorescence gives a somewhat lower 

 value than the whole harvest of the plant in question 

 would have given. In Dracoccphalum moldavicnm, where 

 the values are always small, I collected, in the summer of 

 1895, the seeds of all specimens from the main stem and 

 lateral branches separately, but found no difference (0.4% 

 for both). In Amarantus speciosus the seeds from the 

 terminal panicle regularly gave somewhat higher values 

 than those from the lower branches, but with very slight 

 differences only (1892). The average calculated from 

 20 plants was 2.8% for the former and 1.7%; for the 

 latter. 



In many of my experiments I have saved the seeds 

 which ripened first, separately from those which ripened 

 later: e. g., Amarantus speciosus, Scrophularia nodosa, 

 MerciiriaJis annua, Antirrhinum majus, Silene inflata, 

 and others. No differences of any importance were 

 found in this way. Deviations are sometimes found in 

 larger series, but only such as can be attributed to the 



