138 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



aquatic habit of the plant, justifies at least a conjecture that we have in 

 these fruits relics of an allismoid plant larger and stronger than our living 

 Alisma plantago, but further collections will be needed to justify or disprove 

 this inference. 



Formation and locality : Tertiary (Green River group). Green River, 



Wyoming. 



Carpolithes spinosus Newb. 



PI. LXVIII, figs. 2, 3. 



Proc. U. S. Nat. Mus., Vol. V (March 31, 1883), p. 514. 



"Fruit enclosed in an exocarp composed of three elliptical or lenti- 

 form segments, furrowed along the middle line of the dorsum and bristling 

 with erect, acute spines 6 to 8 millimeters long; peduncle cylindrical, 

 strong, 1 inch or more in length." 



Collected by Prof. I. C. Russell. 



A figure is given of this fruit because of its remarkable character 

 rather than with the hope of establishing its botanical relations. Its occur- 

 rence associated with many palm leaves and its tripartite division afford 

 presumptive evidence that it belongs to the palms, but no living palm fruit 

 suggests itself as an analogue. Apparently all that we see here is a husk 

 or envelope which probably inclosed an elliptical nut that was partially 

 protected by the bristling spines of the outer surface. 



Formation and locality: Cretaceous (Laramie group). North Branch 

 of Purgatory River, Colorado. 



Carpolithes lineatus Newb. 

 PI. XL, fig. 1. 



Ann. N. Y. Lye. Nat. Hist., Vol. IX (April, 1868), p. 31 (name only); Ills. Cret. and 



Tert. PI. (1878), PI. XXV, fig. 1. 



Note. The only manuscript which was found relating to this figure is a 



memorandum of the name and locality on the plate margin. The following descrip- 

 tion was prepared from an examination of the figure: Fruit rounded, elliptical in 

 outline, five-eighths inch long by one-half inch wide, beaked, finely striate in direc- 

 tion of greater dimension. — A. H. 



Formation and locality: Tertiary (Fort Union group). Fort Union, 

 Dakota. 



