FOSSIL FLORA, 685 



Cyperacites? sp. 

 PI. LXXXIII, fig. 0. 



Tlie frag-ment figured is the only specimen of this kind in the collec- 

 tions, and it is too imperfect to be of much value. It is about 3 mm. broad, 

 and appears to be two-ribbed — that is, two of the ribs are shghtly stronger 

 than the others. The fossil is rather faint, l)ut there seems to be only one 

 slender rib between the strong ones. 



With so small a fragment it is impossible to be certain even of the 

 generic reference, but in this respect it seems to agree with forms that have 

 been referred to Cyperacites. It is left for future material to determine its 

 status. 



Habitat: Northeast side of Crescent Hill, Yellowstone National Park; 

 collected by F. H. Knowlton and G. E. Culver, August, 1888. 



S3IILA(E.E. 



Sjiilax lamarensis n. sp. 

 PI. OXXI, figs. .'J, 4. 



Leaves large, of tirm texture, ovate or ovate-oblong, rounded truncate 

 at base, abruptly and obtusely acuminate at apex, margin entire; 3-nerved 

 or obscurely 5-nerved; petiole splitting into 3 equal branches, the middle 

 of which passes straight to the apex, the others bending out to half the 

 distance between midrib and margin, then cur\ang toward and entering 

 the tip; the lateral strong nerves branch on the outside, beginning first at 

 the base of the blade, this branch sometimes reaching up to or near the 

 apex or becoming lost near the middle; sometimes there are lateral strong 

 nerves witli 5 or 6 branches on the outside, all of which unite in broad 

 loops to produce a false fifth nerve. 



This species is represented by several large, finely preserved examples. 

 The largest, represented in fig. 4, was 9 cm. broad and at least 14 cm. in 

 length, and the smallest (see fig. 3) about 4 cm. broad and probably 

 about 8 cm. in length. 



In outline the leaves are broadly ovate or ovate-oblong, with a rounded 

 truncate or cordate base. The apex in some cases appears to be long and 



