FLORA OF THE GREEN RIVER GROUP. 1^9 



ROSA, Linn. 



Rosn Hilliic, sp. nov. 



Plate XL, Figs. 16, 17. 



Leaves small; leaflets oval, obtuse or short-pointed, serrate; stipules large, lance- 

 olate, acuminate; nervation camptodrome. 



These beautiful small leaves represent this genus more distinctly than 

 any of the other fossil leaves which as yet have been referred to it. The 

 leaflets are rather obtuse, the lateral much smaller, 5 to 15 millimeters 

 long, 3 to 7 millimeters broad — all short-pediceled like the terminal ones; 

 the nervation is camptodrome, the figure shows it mostly craspedodrome, 

 a mistake evidently, for as seen on the left side of the largest pinnule, 

 fig. 16, the veins are curved. The nervation near the borders is not quite 

 distinct on the specimens. 



Hab. — Florissant. Princeton Museum, No. 768. Also in the collec- 

 tion of the U. S. Geol. Expl. by Dr. F. V. Harden. 



AMYGDALUS, Linn. 

 Amygdaliis gracilis, ep. nov. 

 Plate XL, Figs. 12-15; XLIV, Fig. 6. 



Leaves ovate-lanceolate, gradually narrowed to the acuminate point and in the 

 same degree to the petiole, serrulate; lateral nerves at a more or less acute angle of 

 divergence, much curved, camptodrome and reticulate along the borders. 



These fine leaves of solid membranaceous tissue average 7 centimeters 

 long and 2 broad, with a slender petiole about 2 centimeters long. They 

 are more or less distinctly minutely serrate ; the nerves, open at base and 

 much curved toward the borders, are joined by undulate nervilles nearly at 

 right angles. 



Fig. 6 of pi. xliv is a leaf slightly longer acuminate, with obsolete 

 nervilles, but without any important difference from the normal form. 



The leaves are related to A. pereger, Ung., in Heer, "Fl. Tert. Helv.," 

 iii, p. 95, pi. cxxxii, figs. 8-12. The fruits, figs. 14 and 15, appear to 

 belong to this genus and possibly to this species. The reference is of 

 course hypothetical. 



^«*.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. Fig. 12 is from a 

 specimen. No. 865, of the Princeton Aluseum. The specimen, fig. 6, is from 

 Randolph County. Wyoming. Prof. Scudder. 



