190 UNITED STATES GEOLOGICAL SURVEY— TERTIAUY FLORA. 



the borders marked by large, blunt teeth, vvhose upper marginal line is 

 horizontal, and thus scarcely turned upward. These characters, as also the 

 narrower shajje of the leaves, always equilateral at the base, and their thicker 

 consistence, seem to constantly and positively separate this species from the 

 following one. There is also a marked difference in the more straight direc- 

 tion of the secondary nerves at the same, and generally more acute angle of 

 divergence, 40° to 45°, entering tlie teeth without curving upward, and some- 

 what thicker. 



Habitat. — Elko Station, Nevada {Prof. S. W. Garman). Castello's 

 Ranch, Colorado {Dr. F. V.Hnyden, Prof. E. D. Cope). Found there in pro- 

 fusion. Mouth of White River, Utah {Prof W. Denton). 



Planer a Ungeri, Zitt. 

 Plate XXVII, Fig. 7. 



Planera Ungeri, Ett., Foss. Fl. v. Vieu., p. 14, pi. ii, figs. .'j-18. — Heer, Fl. Tert. Helv., ii, p. 60, pl.lssx; 

 Fl. Foss. Arct., p. 110, pi. is, fig. 14 b; Fl. Alask., p. 34, pi. v, tig. 2.— Ett., Foss. Fl. v. Hiir., 

 p. 40, pi. X, tigs. 4, 5.— Uog., Foss. Fl. v. Kumi, p. 24, pi. iv, fig,s. 10-1(5. — Sap., £t., ill, 

 1, p. 72. — Sisni., Mater., p. 48, pi. xviii, figs. 2-4. — Ludw., Palajout., viii, p. 100, pi. xsxviii, 

 figs. 9-11 ; pi. xxxix. ix, figs. 3-5, fruits. 



Planera dubia, Le.sqx., Am. Joiiru. Sci. and Arts, vol. xxvii, p. 361. 



Planera lonyifoUaf, Lesqx., Meut. Auuiial Report, 1H73, p. 413. 



Zellcora Ungeri, KovatB iu Uiig., Icouog., p. 42, pi. xx, tig. 19. — Massal., Syn. Fl. FosB. Senog., p. 43. 



Ulmus zeJkovafoUa, Ung , Chlor. Prolog., pi. xiv, tigs. 7-12. 



Uhnus prwionga, Ung., Gen. et Sp., p. 411 ; Iconog., p. 43, pi. xx, flg. 20. 



Vlmus parrifolia, Ung., Iconog., pi. xx, figs. 21 22. 



Comptonia ulmifolia, Ung., Foss. Fl. v. Sotzka, p. 32, pi. viii, figs. 4, 5, 



Fagus ailantica, Ung., Chlor. Protog., p. 105, pi. xxviii, fig. 2. 



Quercus subrubnr, Goepp., Tert. Fl. v. Scboss., pi. vii, figs. 8, 9. 



Quercus aemi-elliplica, Goepp., loc. cil., pi. vi, fig. 4. 



Quercus orcadum, Web., Palieont., ii, p. 172, pi. xvili, fig. 13. 



Castaiicc atavia, Goepp., loc. cit., p. 18, pi. v, figs. 12, 13. 



Leaves short-petioled, ovate-acuminate, generally unequal at the base, simply dentate or crenate ; 

 secondary veins simple or branching near the point, curving upward in entering the teeth. 



The leaf (fig. 7) was mentioned as referable to the former species from 

 a sketch communicated by my friend, Capt. Berthoud. Receiving later from 

 Dr. Hayden a specimen similar to the figure formerly sent, I had opportunity 

 to compare it to those of P. longifolia, and to positively recognize the marked 

 difference in the acute point of the teeth, the nervation, and the general form. 

 I have also examined, as points of comparison, the figures of all the works 

 quoted by Schimper in the above nomenclature, and in none of these do I 

 find any leaf comparable in the characters to those of P. longifolia. We have 

 therefore two species, P. Ungeri, described already from the Miocene of 

 Alaska by Ileer, and the former, exclusively referable until now to the Upper 

 Miocene of Elko and the Parks. 



