30 SIR J. W. DAWSON ON THE FOSSIL PLANTS 
SYMPHOROCARPOPHYLLUM ALBERTUM, 8S. N. (Plate II, Fig. 17.) 
Leaf about an inch in length, obovate, pointed below, rounded at apex, with two 
blunt teeth on the sides. Midrib obscure, veins at very acute angles and evanescent, 
surface finely netted. Upper Laramie of Great Valley. 
Collected by G. M. D. 
S. LINNÆIFORME, 8. N. (Plate II, Fig. 18.) 
Leaf very small, rounded, with five very obtuse lobes, the terminal lobe by much the 
largest. The leaves are tortuous and dichotomous, with a fine reticulation between. Has 
much the general aspect of the leaf of Linnea borealis. ‘Upper Laramie, Porcupine Creek. 
Collected by G. M. D. 
Paniurus CoLOMBI, Heer. 
Heer, Flora Foss. Arctica. Lesquereux, Tertiary Flora. 
Described originally by Heer from Greenland and Spitzbergen, and found along with 
Populus arctica at Carbon, Wyoming. Upper Laramie, Great Valley. 
Collected by G. M. D. 
CARYA ANTIQUORUM, Newberry. 
Newberry, loc. cit. Lesquereux, Tertiary Flora. 
Described by Newberry from the Fort Union beds, in which its leaves are abundant. 
Lesquereux finds it in the Yellowstone Valley and at Evanston. Upper Laramie of 
Porcupine Creek. 
Collected by G. M. D. 
JUGLANS RUGOSA, Lesquereux. 
Lesquereux, Tertiary Flora. 
In the Report on the 49th Parallel I referred these leaves to Juglans nigella of Heer, 
but they are still nearer to Lesquereux’s figures, if these represent a true species and not 
merely a varietal form. 
In confirmation of the reference of this and the following species to Juglans, I may 
mention that, in some of the silicified wood of the district which affords the leaves, there 
are trunks which have been sliced by Mr. Weston and show the structure of the modern 
butternut. Porcupine Creek, Upper Laramie. 
Collected by G. M. D. 
JUGLANS SCHIMPERI, Lesquereux. 
Lesquereux, Tertiary Flora. 
Lesquereux’s description is as follows :—‘ Leaves lanceolate, gradually acuminate, 
broadly cuneate, and rounded at the inequilateral base to a short petiole; borders slightly 
undulate, secondary veins numerous, parallel, curved, closely following the borders, 
nervilles distant, areolation subquadrate.” Leaves answering to this description occurs 
in the Upper Laramie shale of Great Valley. Lesquereux’s specimens were from the 
Green River group, which is reported as typical Eocene, and may be newer than the 
Upper Laramie. 
Collected by G. M. D. 
