42 



Florissant, which is smaller, with more closely spaced teeth, 

 longer petiole, more ascending primaries, and ovate form; Celtis 

 besseyi Barbour 2 from supposed Miocene beds in Nebraska; and 

 Celtis obliquifolia Chaney 3 from the Bridge Creek beds of the 

 Crooked River basin in Oregon. The last is smaller, only sub- 

 cordate, less produced distad, with more ascending primaries 

 and the margins entire or sparingly toothed. 



The present fossil species is not very different from the exist- 

 ing Celtis occidentalis Linne which is found in southeastern 

 North America and in southern Idaho, eastern Washington and 

 Oregon, and the Puget region of Washington. Its range suggests 

 a formerly more continuous distribution which has become par- 

 tially segregated by post-Tertiary dessication in parts of its 

 former area of distribution. 



The Johns Hopkins University 

 Baltimore, Md. 



2 Barbour, E. H., Hackberry conglomerate, a new Nebraska rock: Ne- 

 braska State Bull. 8, vol. 1, p. 88, figs. 47, 48, 50, 51, 1925. 



3 Chaney, R. W., Notes on two fossil hackberries from the Tertiary of the 

 western United States: Carnegie Inst. Washington, Pub. No. 349, p. 52, pi. 1, 

 figs. 1, 3, 5, 1925. 



