with Descriptions of - New S J / ji 



similar, although D anker's specimen wants both poin( 

 base. 



Formation and Locality. Lower Cretaceous Btrata, B 

 bird Hill, Nebraska. (Dr. Hayden.) 



Salix flexuosa. (n. sp.) 



Leaves narrow, linear, pointed at each end, sessile or very Bhort- 

 petioled; medial nerve strong, generally somewhat flexuous; -• € -. . j i . 1 - 

 ary nerves pinnate, leaving the principal nerve al an angle of about 

 40°, somewhat branched and flexuous, but arching so as to in< - 



late near the margins. 



This is perhaps only a variety of the precedii . v 



ITeekii), which it resembles in its nervation as far 

 observed in specimens fossilized in sandstone, but, all 

 much narrower in its generalform, it is less acuminat 

 extremity, and is apparently sessile. As in some of our In 

 narrow-leaved willows, these leaves arc generally son 

 flexuous, and as they are seen lying in their natural cur 

 the surfaces of the rock, they have as familiar and pi 

 willow-like a look as leaves of Salix angustifolia would, if i 

 ficially fossilized in the manner followed by Goeppert. 



Since the above description was written, I have 

 this species from a number of widely separated locality 

 found it to hold its characters with great constani 



Formation a n d Local ity. Big Sioux, Blackbird II ' 

 Spring, cv;c, Nebraska. Colorado, and New M 



Salix cuneata. (n. sp.) 



Leaves of medium size, sessile or shorl p< tiol I, 

 narrow, acute at both ends, broadest toward ,; 

 narrowed below to the base; medial nerve •! 

 nerves delicate, springing from the midrib :it an ni • 



near the middle of the leaf, 15°— 2 

 near the bases, gently arche 

 gins. 



