220 UNITED STATES GEOLOGICAL SUKVEY— TEKTIARY FLORA. 



nerves into branches is also far less defined. The leaf of fig. 7 appeared, by 

 the addition of one pair of lateral nerves, to represent a different species. It 

 is, however, found upon the same piece of shalj hard sandstone as the leaves 

 of figs. 1-3; and from an analogous distribution of the nervation, in leaves of 

 species of our time, as remarked above, it is evident that it cannot be separated. 

 Except this casual addition of a lower pair of nerves, the characters are exactly 

 alike. I have been for a long time undecided in regard to the possible iden- 

 tity of this northern species with the beautiful Cmnmnojnum Mississippiense, 

 Lesqx., communicated by Prof Eug. W. Hilgard, and described in Trans. 

 Amer. Phil. Soc, vol. xiii, p. 41S, pi. xix, fig. 2. From the larger size of the 

 Mississippi leaf, more enlarged below the middle, its more rugose nervation, 

 and the greater distance of the lateral nerves from the borders, I came to the 

 conclusion that the leaves of Golden did represent a new species, or at least 

 a diminutive variety of C. Mississippiense. This may be an error. Even as 

 the relation of all these leaves to those described by European authors as C. 

 polymorphum is evident, we may have a simple variety. In that way, it would 

 be necessary to unite in one some other species like C spectnndum, Sap., C. 

 spectabile, Heer, which bears to C Mississippiense as marked a relation as that 

 of C. affine. 



Habitat. — Golden, Colorado, where the fine large specimen was discov- 

 ered and communicated by Capt. E. Brrthoud. A specimen also, with a 

 number of leaves of the same character, has been lately sent by Rev. A. 

 Lakes. The specimen of fig. 4 is the first obtained, and already mentioned 

 in the Annual Report of 1869. It is from Marshall's Mine, Colorado {Dr. F. 

 V. Hayden). I found others also at Carbon, Wyoming. The species has a 

 wide distribution. 



Cinnamomuin Sclieuctazeril, Heer. 



Plate XXXVII, Fig. 8. 



Cinnamomum. Scheuchzeri, Heer, Fl. Tert. Helv., ii, p. 35, pi. xci, figs. 4-24; xcii, xciii, figs. 1, 5. — Lesqx., 

 Annual Report, 1871, p. 29. 



Leaf small, oblong-lanceolate, cuneate to the petiole; lateral veins joining the midrib in a curve, 

 ascending parallel to the borders, scarcely branching; nervilles distinct,. in right angle to the midrib. 



Though the characters of the species are recognized in this fragment 

 by the small size of the leaf, its comparatively broadly cuheale base, and the 

 union of the lateral nerves to the midrib high above the base and in a curve, 

 I am not positive about its specific relation, the less so that we have until 



