Xo. 491] 



PLEISTOCENE PLANTS 



695 



the Pleistocene of North CaroHna, and also agree admirably with 

 leaves from the existing tree, so that the identification is reason- 

 ably sure in spite of the meager materials. 



Ran ALES. 



Liriodendron tuhpifera I>inne, Sp. PL, p. 535, 1753. 



The tulip tree is a common mesophile type of the Alleghenian, 

 Carolinian and Louisianian zones, its southern limit in Alabama 

 being about latitude 31°. Material from Abercrombies I^anding 

 contained two positively identified winged carpels and several more 

 doubtfully determined fragments all of which came from the peat. 

 The genus Liriodendron, which has such an extremely interesting 

 geological history,^ has furnished a large number of American 

 Cretaceous species ranging from the mid-Cretaceous onward, but 

 none have been totmd m the American l ertiar^'. In Europe and 

 the Arctic regions, liowever, a lunnber of Tertiary forms have 

 been (lescribed, especially from the Pliocene, — the leaves of 

 Liriodnidron procaccinii rtigei- fi-om France and Italy being 

 scarcely .h-stinguishable from' those of tlie existing species. The 

 material from Alabama is, so far as 1 am aware, the first Pleisto- 

 cene record of Lirio(len(h-on, althoiigli Schmalhauseii records 

 leaves wliich lu' has i(U^ntific<l as this six^cics from the Altai :^Ioun- 

 tains of (Vntral Asia in strata which he refers doubtfullv to the 

 Pliocene.^' 



Platanus occidentalis Li 



