FLORA OF THE GREEN RIVER GROUP. 185 



The leaves have a great affinity in their characters to those of species 

 of Fraodnus. They are, however, equilateral on the borders and the nerva- 

 tion is different. Figure 3 of pi. xl may represent another species; the 

 leaf is broader and slightly unequilateral. The decurrent base of the leaf 

 and the type of nervation are the same. 



Hob. — Florissant; not rare. U. S. Geol. Expl. Dr. F. V. Hayden. 

 Fig. 10 represents two leaves, Nos. 648 and 870 of the Princeton Museum. 



Cclastrinites elegans, sp. nov. 

 Plate XXXI, Figs. 9, 10. 



Leaves nearly round, membranaceous, somewhat long-petioled, crenate on the 

 borders; nervation pinnate; secondary veins oblique, parallel, reticulate and effaced 

 along the borders. 



The leaves are very small, II to 21 centimeters long and about the 

 same width, rounded or broadly cuneate to the petiole. 



Figure 10 is truncate at base and its nervation appears triple-nerved, 

 as in Populus; but the surface is somewhat erased and the upper second- 

 ary nerve obsolete, and as all the other characters are alike the difference 

 is not considered. 



Hob. — Florissant. Princeton Museum, Nos. 799 and 868. 



ILICE^E. 



ILEX, Linn. 

 "U. S. Geol. Rep.," vii, p. 269. 



Ilex pseiido-steuophylla, Bp. nov. 



I. stcnophylla, Lesqx.; Hayden's "Ann. Rep.," 1871, Supp't, p. 8. 



Leaves small, coriaceous, very entire, obovate or oblauceolate, obtuse, short- 

 pedicellate; medial nerve thin; lateral nerves very oblique, much curved near the 

 borders, anastomosing. 



The leaf is much like those of /. stenophylla, Ung., "Syllog.," ii, p. 14, 

 pi. iii, figs. 15, 27, being, however, smaller with a shorter broad pedicel. 

 The nervation is like that of figs. 24 and 25 of Unger. The leaves 

 described in Hayden's "Ann. Rep.," loc. cif., have the same degree of 

 affinity to Unger's species and are all larger. They apparently represent 

 an American variety of the species. 



Hab. — Florissant. No. 59 of Lacoe's Collection. 



