266 MESOZOIC FLORAS OF UNITED STATES. 



it is much like SaUciphyllum ellipticum Font." of the Lower Potomac 

 of Virginia. It may be the same species, but it widens more suddenly 

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



Saliciphtllum californicum Fontaine n. sp. 



PI. LXIX, Fig. 9. 



Another Salix-like leaf was found associated with Saliciphyllum 

 pachyphyllum at locality No. 23, which, however, is obviously different 

 from it. This, too, shows onlj' one imprint, but the reverse was 

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

 in form, with the base and summit not preserved, so that the exact 

 shape of the entire leaf can not be made out. It shows a slender but 

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

 and, like S. pachyphyllum, hsiS a recent aspect. The texture indicates 

 a leaf decidedly thinner than S. pachyphyllum. 



Genus POPULUS Linnajus. 



PopuLTJS ? RiCEi Fontaine n. sp. 



PL LXIX, Fig. 10. 



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

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

 can not be determined from this small amount of material. As its 

 facies 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, but fiat. 

 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 by the shells that the rock contains. 



a Monogr. U.S.Geol. Surv., Vol. XV, p. 303, pi. cxivi.figs. 2, 4; pi. cl,fig. 8; pi. clxiii, fig. 5; f>\. clxvii,fig. 2. 



