312 



COCKERELL : FOSSIL PLANTS FROM FLORISSANT 



10 mm. broad at base ; the least diameter of the leaf, at a distance 

 of some 35 mm. from the apex, is 13 mm.; the lateral veins leave 



the midrib at an angle perhaps a little 

 less than 45 °. The specimen, as pre- 

 served, is light reddish. (Figure 6.) 



Southwest of Florissant, 1905 {Hen- 

 derson & Ramaley). 



Fig. 6. Car duns Ho r is s an- 



iens is Cockerel 1. 



I take this opportunity to correct the 

 current name of a Wyoming fossil : 



' Populus aequalis Schimp. Pal. 



Veg. 2 : 693. 



Populus laevigata Lesq. Am. Jour. Sci. 



II. 45 : 205. Not P. laevigata Ait. 



1789. 



Also of a species of the Dakota 

 group : 



Populus dakotana nom. nov. 



Populus cordifolia Nevvb. Later Extinct Floras 18. 1868. Not 

 P. cordifolia Burgsdorf, 1787. 



Also of a Fort Union species : 



Fop it I us acerifolia 

 P. acerifolia Lode 



Boulder, Colorado. 



Populus Newberryi nom. nov. 



1868. Not 



