External Conditions and Manuring. 
317 
way I filled two beds of about two square meters each 
in the summer of 1892. They gave a very characteristic 
half curve when the inflorescences were plotted according 
to the number of flowers on that part of the axis which 
had proliferated. These numbers varied from to 10 
and were distributed as follows (August 1892) : 
NUMBER OF FLOWERS ON THE PROLONGATION 
OF THE AXIS 
Inflorescences 0123456789 10 
On the 1st bed 325 83 66 51 36 36 18 7 6 1 1 
" " 2nd bed 403 97 62 35 46 20 20 14 11 3 2 
11 Totals 
630 
1 721 
Fig. 60. Trifolium repens pernmbellatum. Four different 
inflorescences from the same culture, 1891. A, with thick 
continuation of the main axis ; B, the continuation thin 
and sparsely covered with flowers ; C and D, with three- 
fold continuation. 
We see that one-half of the inflorescences on this 
plant had proliferated this time, partly as the result of 
selection, partly on account of improved cultivation. Most 
