PAST HISTORIES OF PLANT FAMILIES 



81 



Fig. 59. Dicotyledonous Leaf Impression from Tertiary Rocks 



couple of such seeds, which show 

 but also the small antennae - like 

 stigmas. Specimens so perfectly 

 preserved are practically as good 

 as herbarium material of recent 

 plants, and in this way the ex- 

 ternals of the Tertiary plants are 

 pretty well known to us. 



A problem which has long been 

 discussed, and which has aroused 

 much interest, is the relative an- 

 tiquity of the Monocotyledonous 

 and the Dicotyledonous branches 

 of the flowering 1 plants. A peculiar 



r i 



fascination seems to hang over this 

 and a battle of flowers may be said 



( C 122 ) 



not only their wings 



Fig. 60. Seeds from Japanese 

 Tertiary Rocks; at a are seen 

 the two stigmas still preserved 



still unsolved riddle, 

 to rage between the 



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