296 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



MYRTIFLORJG. 

 MYRTACE^. 



Of this family, of which a large part of the present flora of New Hol- 

 land is composed, we have only two species whose characters seem related to 

 those of the genus Eucahjptus, as represented by fossil remains. They do 

 not appear, however, satisfactorily identified. 



EUCALYPTUS, L'Herit. 



Eucalyptus Ha;ring'iaiia!, Ett. 



Plate LIX, Fig. 10. 



Eiicaiypltis IT(eringiaiia,^tt., Har. Fobs. F1., p. 84. pi. sxviii, figs. 2-25.— Heer, Flor. v. Bornst., p. 19, pi. 



iv, Bg. 14. 

 EucalyptM Haringiana t, Lesqx., Annual Report, 1872, p. 400. 



Leaves linear-lanceolate to the point and to the slightly inequilateral base; secondary nerves 

 alternate, mostly simple, ascending to the point, parallel to the midrib. 



If some of the leaves figured by the author of the Flora of Bilin have 

 the same form and size as these, that one represented by Heer in the Born- 

 staedt Flora differs by its cliaracters, form, and nervation. I am therefore 

 now more uncertain in regard to the relation of this species than when I 

 described it loc. cit., when this Bornstaedt Flora was still unknown to me. 

 The nervation is somewhat like that of Grevillea species; for example, G. 

 provincialis, Sap. (Et., i, p. 99, pi. viii, fig. 3), and still more hke that of some 

 Mimosce: Prosopsis, etc. 



Habitat. — Black Buttes, Wyoming, in red baked shale 



£ucalyi>tus lAnicricaiia, Leeqx. 

 Plate LIX, Figs. 11, 12. 

 Eucalyptne Americana, Lesqx., Supplement to Annual Report, 1871, p. 7. 



Leaves subcoriaceous, very entire, narrowly lanceolate, gradually tapuring upward from below 

 the middle into a long, narrow acumen, narrowed in the same degree to the base, sessile ; middle nerve 

 thick, enlarged at the point of attachment ; lateral nerves oblique, straight to near the borders, where 

 they join a continuous marginal vein. 



These fine leaves have the nervation and shape of species of this genus. 

 They are comparable, for the nervation at least, to E. oceanica, Ung., as fig- 

 ured by Heer (Flor. Tert. Helv., pi. cliv, fig. 14). In this figure, the lateral 

 nerves are more open; but, in the species represented by the leaves of the 

 Baltic Flora of the same autlior, they are more oblique than in those described 

 here. Since 1871, the time when they were first considered, I have obtained 



