2i)iS .Mlv>C)ZL)lC FLORAS OF INITKI) STATP:S. 



it is much like SnliciphyUu))) cllipticnm Font." of the Lower Potomac 

 of Virsiiiin. It may he the same species. t)ut it widens more suddenly 

 and decidedly in its widest portion than do any of the Potomac leaves. 



SaLKH'IIYI. MM ( AIIKOUNICIM FdlltaillC 11. sp. 



I'l. 1-.\IX, Fig. !). 



Another Salix-like leaf was found associated with S(dicl jthylhim 

 pachyphyllum at locality Xo. '23, which, however, is olniously different 

 from it. This, too, shows onl}- one imprint, hut the reverse was 

 ohtained in this case. Nearly the whole leaf is preserved. It is oblong 

 in form, with the base and sunuiiit not preser\-ed, so tliat the exact 

 shape of the entire leaf can not l)e made out. It shows a slender but 

 distinct midrib and no other nerves. It is apparently a new species, 

 and, like .S. pachyphyUinn, has a recent aspect. The texture indicates 

 a leaf decidedly thinner than N. pachypJtyUum. 



Gemus POPULUS Linnieus. 



Popui.us 'i RicEi Fontaine n. sp. 



PI. LXIX, Fio;. 10. 



This is shown in only one specimen. It is the lower part of a 

 dicotyledonous leaf of small size with a thick texture. Its exact place 

 can not be determined fi'oni this small amount of material. As its 

 fades is that of Populus it is placed doubtfully in that genus. The 

 specific name is derived from Mr. Claude Rice, its discoverer. 



The texture of the leaf is so thick that the secondary nervation 

 is not visible. Only the midrib and petiole can be seen. The basal 

 portion of the leaf is well preserved, showing distinctly its shape, with 

 the midrib and a portion of the petiole. The latter is curved, prob- 

 ably as an accident in preservation. The midrib is strong, hut flat. 

 The leaf narrows to a wedge shape at its base. 



This specimen was found by Mr. Claude Rice in the Cow Creek 

 Valley, on Wilson Creek, 25 miles southeast of Buck Mountain in Ore- 

 gon. It occurs in a fine-grained gray sandstone, which is of Horsetown 

 age, as is shown tiy the shells that the rock contains. 



a Monogr. U.S. Geo). Surv., Vol. XV, p. 303, pi. cxlvi, figs. 2, 4; pi. cl, fig. 8; pi. clxiii, fig. 5; pi. clxvii, fig. 2. 



