Die áltesten dikotyledonen Pflanzeu der Potoraac-Formation. 265 



Bombax 







1. 



Species. 



Populophyllum 



gen. 



nov. 



2. 



5) 



Ulmophyllum 



)) 



H 



3. 



)5 



StercuUa 









)) 



Aralia 









J5 



Juglandophyllum 



)5 



H 





» 



Myricaephyllum 



1-1 



n 





)) 



Platanophyllum 



J7 



)i 





n 



Araliaephyllum 



n 



)5 





H 



Hymenaea 









n 



Aceriphyllum 



n 



« 





5) 



Menispermites 



v 



)5 





5J 



AristolocMaephyllum 



)5 



)5 





» 



Hederaephyllum 



» 



?? 





5J 



Eucalyptophyllum 



n 



)) 





H 



PhylUtes 









» 



Acaciaephyllum. — This is a peculiar genus with small spatu- 

 late elliptical leaves, wliich much resemble those of some of the 

 Australian Acacias, in which phyllodes act the part of leaves. The 

 species are rare, but occur with the older elements of the flora at 

 a number of localities. 



Proteaephyllum. — This is a widely diffused genus, the species 

 occuring both with the older and newer elements at many localities. 

 They, howerer, nowhere show a great abundance of specimens. Most 

 of the species are markedly archaic in type and remind one most 

 of some of the forms of Prótea. 



Rogersia. — This genus named in honor of Prof. Wm. B. Eo- 

 gers, although nevěr abundant, is one of the more common forms 

 associated with the older elements of the flora. It is decidedly ar- 

 chaic, with a lax irregular nervation reminding one of some ferns. 

 The leaves are long and narrow, resembling in outline those of some 

 Eucalyptus. 



Sassafras. — This belongs decidedly with the younger elements, 

 and has nevěr been found where the older types predominate. One 

 of the species can hardly be distinguished from the living one. This 

 plant has been found at very few localities and is one of the rarest 

 genera. 



The still living genera Ficus, Bombax^ Myrica^ StercuUa^ Aralia^ 

 Hymenaea^ are among the greatest rarities, being exceedingly re- 

 stricted in distribution, and possessing only a very few specimens 



