714 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



FlCUS SHASTENSIsf Lx. 

 Ficus shaxtensis Lx.: Proe. U. S. Nat. Mus., Vol. XI, 18S8, p. 28, PI. XI, fig. 3. 



This species was described by Lesquereux from Shasta County, Cali- 

 fornia. It was said to be 6 cm. long and 3.5 cm. broad, and with a very 

 thick petiole. The Park leaf is 8 cm. long- and 4.5 cm. wide, and lacks the 

 petiole. The nervation appears identical, but I have hesitated to make a 

 positive identification on such scanty material. 



Habitat: Lamar River, between Cache and Calfee creeks, on the same 

 piece of matrix as Salix angusta and Lygodium kaulfusii ; collected by F. H. 

 Knowlton, August 27, 1888. 



Ficus sordida Lx. 

 Ficus sordida Lx. : Mem. Mus. Comp. Zool., Vol. VI, No. 2. 1878, p. 17, PL IV, figs. (>, 7. 



A single fragment, representing the lower side of a leaf of about the 

 same size and nervation as fig. 7 of Lesquereux's plate. 



Habitat: Specimen Ridge, Fossil Forest, "Platanusbed;" collected by 

 Ward and Alderson, August 25, 1887. 



Ficus densifolia n. sp. 



PI. LXXXIX, fig. 1; PL XG, figs. 1,2; PL XCI, fig. 1. 



Leaves large, very thick, unequal-sided, irregular long-obovate, 

 broadest at or above the middle, obtuse above, narrowed below to a 

 rounded truncate or slightly heart-shaped base; margin entire or very 

 slightly undulate; petiole not preserved; midrib very thick, slightly 

 ftexuose; secondaries 8 or 9 pairs, lower opposite or sub-opposite, others 

 alternate; lower secondaries thin, nearly at a right angle with midrib, 

 others irregular, remote, at various angles, much arching upward, occa- 

 sionally forked, all camptodrome, and joining by broad loops; middle 

 secondaries sometimes branched on the outside, the branches joining by 

 broad loops near the margin; nervilles strongly marked, mainly broken, 

 producing by union large quadrangular areas; finer nervation producing 

 irregular quadrangular areas. 



This fine species differs markedly from all others obtained in the 

 Yellowstone National Park, and is quite unlike any American form. The 

 smaller leaves are 13 or 14 cm. long and 5 or 6 cm. broad, while the larger 



