202 UNITED STATES GEOLOGICAL SURVEY— TERTIARY FLORA. 



orado, rare; Point of Rocks {Dr. F. V. Hayden). Mr. Geo. Hadden recently 

 sent a specimen of the same character and size as that of fig. 3 from Coal 

 Creek, Colorado. 



Ficus planicostata, var. lati folia, Lesqz. 



Plate XXXI, Fig. 9. 



Ficus planloo!itata,yax. laiifolia, Lesqs., Aunual Report, 1872, p. 391!. 



Loaves large, subcoriaceous, broadly round, subcordate; nervation same as the former. 



This variety merely differs in the larger size and the broadly round 

 form of the leaves, whose base is slightly cordate. I have found only two 

 leaves with these characters; they do not seem distinct enough to author- 

 ize a separate specification, though the numerous specimens representing the 

 normal form do not deviate in any way from it. The specimen as seen in fig. 

 9 a bears at the corner a small fruit, nearly round, narrowed to a short, broad 

 pedicel, with its surface wrinkled, comparable to the fruits of some of the 

 present species of Ficus of Cuba, like F. dimidiata, for example. I found 

 another at tlie same locality upon a piece of soft shale, unhappily crushed in 

 tlie transportation of the specimens; its size was like that of a small walnut, 

 and its shape and appearance like that of the one figured here. 



Habitat. — Golden, Colorado, and Black Buttes, Wyoming. 



Ficus i>I a nicosta ta, var. Ooldiana, Lesqz. 



Plate XXSIII, Figs. 1,1a, 2, 3. 



Ficus plaiiicosfata, var. Goldiana, Lesqx., Annual Report, 1873, p. 399. 

 Ficus Clintoni, Lesqx., Annual Report, 1872, p. 393. 



Leaves large, oval, contracted upward into a short acumen, ronnd-cuneate to the baso, primary 

 and secondary nerves thin. 



It may be that the leaves of pi. x.xxi, figs. 7, 8, 11, 12, which I consider 

 as mere young, undeveloped representatives of the normal form, are referal)le 

 to this so-called variety, for they evidently differ, by their narrow veins and 

 thin substance, from the small, still unopened leaves of fig. 6 of the same 

 plate, which has the principal nerves as broad and flat as in fig. 1. They 

 have, however, the obtuse point, and have been found all mixed with the 

 others at Black Buttes. Fig. 10 of pi. xxxi also is related to this variety by 

 its top, contracted into an acumen, but here we have flat nerves, and the leaf 

 has been found at Golden. These three leaves of pi. xxxiii are larger, some- 

 what more distinctly narrowed to the base, the veins curving still closer to 

 the borders, which they seem to enter. They appear abo narrowed upward 



