DESCRIPTIONS OF SPECIES. 81 



but there seems to have been no other tree growing in the locality where 

 these specimens are found of which this could well be the fruit. 



The fruit of U. fulva has nearly the same form as this, but is only 

 about half as large, while the fruit of U. Americana is still smaller and is 

 obovoid and cilliated. 



Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. 



Planera crenata Newb. 

 PI. LVII, fig. 3. 

 Proc. U, S. Nat. Mus., Vol. V (March 21, 1883), p. 508. 



"Leaves oblong, ovate; short petioled; 5 centimeters long by 25 

 millimeters wide; base rounded; summit blunt-pointed; margins coarsely 

 crenate; nervation simple, delicate, six simple branches on each side of 

 the midrib terminating in the crenations of the margin." 



Collected by Dr. F. V. Hayden. 



In general aspect these leaves resemble some of the varieties of 

 P. Ungeri, but differ from them in the crenate margins, the lobes being- 

 fewer and all rounded. In these respects it differs also from the species 

 described in this volume, P. longifolia Lesq. (PL LVIII, fig. 3), P. variabilis 

 Newb. (PI. LXVI, figs. 5, 6, 7), and P. nervosa Newb. (PI. LXVII, figs. 2, 3). 



Formation and locality : Tertiary (Eocene ?). Tongue River, Montana. 



Planera longifolia Lesq. 

 PI. LVIII, fig;. 3. 



Hayden's Ann. Rept., 1872 [1873], p. 371; Tert. Fl. (1878), p. 189, PI. XXVII, figs. 

 4-6. 



Note.— So identified and located by Dr. Newberry, as indicated by memoran- 

 dum on margin of plate. Further information lacking. — A. H. 



Formation and locality : Tertiary (Miocene). Florissant, Colorado. 



Planera microphylla Newb 



PI. XXXIII, figs. 3, 4. 



Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 55; Ills. Cret. and Tert. PI. 

 (1878), PI. XVI, figs. 3, 4. 



" Leaves very small, ovate-lanceolate, generally unsymmetrical, curved 

 or falcate, cordate at base, pointed but rarely acute, coarsely and bluntly 

 mon xxxv 6 



