FLORA OF THE MIOCEXE EPOCH. 



93 



other Pines. The difficulty is still greater in fossils (Hook. 

 Kew JouiTi. T. 413. There are a very small number of 

 plants belonging to ordei*s with gamopetalous corollas. In 



Fi?. 96. 



FiiT. 97 



the Miocene formation of Lough Xeagh in Ireland, and of 

 Mull in Scotland, silicified trunks of considerable size have 

 been foimd. The Irish silicified wood has been denominated 

 Cupressoxylon Pritchardi from its apparent resemblance to the 

 Cypress. As connected with the Miocene epoch, we may 

 notice the leaf-beds found at Ardtun, in the island of Mull, 



Figures 96 to 99 show the leaves of plants belonging to the 

 Miocene epoch. 



Fig. 96. Acer triloba turn, a three-lobed palmate leaf, like that of 

 the Maple, with the lobes unequal, inciso-dentate, the lateral ones 

 spreading, found at (Euingen. Fig. 97. Ubnus Bronnii, a petiolate 

 leaf, like that of the Elm, unequally ovato-acuniinate, feather-veined 



