Structure, etc., of Epiphegus Virginiana. 357 



intermediate forms. In a very few cases chasmogamic and 

 cleistogamic flowers were mixed in the same area of axis. 



In order to get an idea of the rate of development and 

 number of chasmogamic flowers appearing, specimens 

 selected at random were studied closely. The method con- 

 sisted in noting the number of axes of inflorescence. The 

 number of chasmogamic flowers was counted, also the num- 

 ber of buds beyond these flowers. The buds included in 

 this last series were never those which would evidently soon 

 expand into chasmogamic flowers. 



With some of the specimens further details were recorded. 

 At the apex a red cord was tied and the plant allowed to 

 develop. This marking was done on September 12 and 

 plants were examined for final record during the first week 

 in October. No axis showed at this time an addition to the 

 number of chasmogamic flowers, but the number of cleisto- 

 gamic buds was often greatly increased. 



On the whole the percentage of chasmogamic flowers 

 was much greater than was anticipated when the counting 

 was begun. The accompanying table will give a fair idea 

 of the observations. Records of many more than those 

 siven in Table I were made. One not included in this, 

 because of space required, deserves a special reference. It 

 was a quite tall inflorescence of twenty-seven axes ; it bore 

 one hundred and three chasmogamic flowers, most of which 

 were found on eight axes, the other axes showing none. 

 The exact number of cleistogamic was not ascertained, but 

 was very large. 



