THE EVOLUTION OF PLANTS 



231 



TABLE iv 

 (After Arber and Parkin) 



Recent 



Tertiary 



Mesozoic 



.2 



Palaeozoic 



a 

 



Ranalian plex us 



Eu-antliostrobilateae 



Pro-anthostrobilateae 



8J 



H 



M 



a 



a 



's 



D 

 



Monosporangiateae 



Q 



rs 



5 



Amphisporangiateae 



sperms, according to Arber, 1 was the transfer of the pollen- 

 collecting surface from the ovule to the carpel or carpels, 

 resulting in the stigma as now known. "It was this act 

 which called the Angiosperms into being." 



Arber does not regard the Apetalous orders (Piperales, 

 Amentiferous families, and Pandanales) as primitive 

 Angiosperms, for that theory necessitates the view that 

 the perianth arose de novo, by enation. 2 He considers 



1 Arber, E. A. Newell. On the origin of Angiosperms. Jour. Linnean. 

 Soc. Bot. 38: 29-80, July, 1907. 

 2 C/. p. 132, 



