Variation in the Ray-flowers 

 of some Compositae. 



By 

 K. Koriba. 



{Continued from p. 90.) 



II. Aster trinervius Roxn. var. congestus Fr. et Say. 



This plant was collected, together with the one to be next 

 mentioned, in the neighbourhood of Aomori. The plant was 

 found widely distributed, growing under various conditions, and 

 I have selected for the collection two plots of possible uniform 

 condition, the one along the northern side of the railway-em- 

 bankment running directly from east to west, and the other, 

 along the eastern bank of the Tsutsu mi-River running directly 

 northwards and about | mile south of the former. In the former, 

 the embankment somewhat hindered the sunlight and the soil, 

 with a denser vegetation, seemed more or less wetter than the 

 latter where the plants were fairly exposed. 



On Aug. 15 I visited these plots for the first time. It was 

 the very beginning of the season and only a few heads were seen 

 with withered rays. Following data were obtained : 



F'irst collection. Aug. 15. 



In the former, both the range and C were a little greater 

 than the latter (Fig. 8 and 9), but the mean was nearly 



