252 



MISCELLANEOUS STUDIES 



Altogether, these cultures are doubtless much less reliable for their 

 size than the greenhouse tests of the early type, but they nevertheless, 

 with due consideration of the points just mentioned, seem to permit 

 of fairly safe conclusions for most of the parents. 



The plants were examined for flowering every other afternoon from 

 July 4 to November 3, inclusive (73 to 195 days from sowing) . A very 

 large part of the plants flowered in July, some in August, and a few 

 still later. Evidently the high summer temperature largely inhibited 

 flowering ; many of the singles and a few of the doubles entirely failed 

 to flower. 



100 



00 



so 



70 



50 



40 



30 



10 



Chart 3. 1911, field; lots transplanted from greenhouse. Percentages of 

 progeny lots with primary cluster flowering or aborted by October 10-16, for 

 singles. Lines as in chart 2. 



Figures 5 and 6 show the plants in July. Growth was usually 

 vigorous through the season, but the internodes were very short, the 

 branches numerous, and the region of the terminal inflorescence often 

 abortive, so that determination of the number of main-stem internodes 

 was not practicable. The emergence of the earliest corolla on the plant 

 was recorded at the bi-diurnal observations, and at two periods during 

 the season the aborted primary clusters were noted. 



The data show very definitely the transmission of "earliness" by 

 the fewer-noded progeny of WG9-C10. Tables 15 and 16 show the 

 numbers of plants alive, without having flowered, on November 3 ; the 

 figures are thus a measure of lateness. The two progeny lots in each 

 row are given one line in each of the tables, in order to facilitate 

 separate comparison of the fourteen lots in each end half of the plot. 



[110] 



