714 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



FiCUS SHA8TEXSIS? Lx. 



Ficiis sha.stcusis Lx. : Proc. U. S. Nat. Miis., Yol. XI, 18S8. p. 28, PI. XI, fig. 3. 



This species was describ('(l hy Lesquereux froiu Shasta Couiity, Cali- 

 foniia. It was said to be G cm. long- and 3.') cm. broad, and with a very 

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

 petiole. The nervation appears identical, Init 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 Sali.r anf/usta and Li/[jodmiii l-attlfusil ; collected by F. H. 

 Knowlton, August 27, 1888. 



FiCUS SORDIDA Lx. 

 Flcus sordida Lx. : Mem. :\Ins. Coiiip. Zool., Yol. YI, No. 2, 1878, p. 17, PI. lY, figs. 6, 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 

 AYard and Alderson, August 2b, 1887. 



FiCrS DENSIFOLIA n. sp. 

 PI. LXXXIX, fig. 1 ; PI. XC, flg.s. 1,2; PI. XCI, fig. 1. 



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

 l:)r(tadest 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 

 flexuose; secondaries 8 or H pairs, lower oi)})Osite or subopposite, others 

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

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

 sionally forked, all camptodrome, and joining 1)}' Ijroad loops; middle 

 secondaries sometimes branched on the outside, the branches joining by 

 broad looj^s near the margin; nervilles strongly marked, mainly broken, 

 producing by union large quadi-angular 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 Amei-ican form. The 

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



