THE FLORA OF THE SAIXT EUGENE SILTS 



409 



have introduced (see plate 46) figures oi' leaves of Cehdtha Caro- 

 lina (figures 1 and 2), Cissampelos Pareira Linnaeus! (figure 

 3), Cissampelos fasciculata Bentham (figure 4), Cissampelos 

 microcarpa De Candolle (figure f)), Menispermiim canadense 

 Linnaeus (figure 6), and M. diver sifolium (Miquel) Prantl. 



In the Old World a fossil species that compares very closely 

 with certain of our specimens is Cocciilus latifolius (Saporta) 

 Saporta & Marion''' {=Menispermum lati folium Saporta), from 

 the Pliocene of France. A comparison of our figure 1, plate 

 38, with Saporta 's figure 6, plate 31 {loc. cit.), shows a some- 

 what striking resemblance ; and it is of interest to note that Sa- 

 porta also had difficulty in deciding between the genera Meni- 

 spermiim and Cocciilus {= Cebatlia), as to which one his species 

 should be referred. 



Incidentally, comparison may also be made between the lobed 

 and lobate-dentate forms in our collection and certain leaves 

 from the Miocene of Washington, described and figured by 

 Knowlton^° under the names Populus heteromorpJia and P. 

 Fairii, several of which present a remarkable resemblance to our 

 figures 3 and 4, plate 38, and figure 1, plate 39, but whether or 

 not there is any special significance in connection with this re- 

 semblance I would not venture to infer or suggest. 



Order ROSALES 

 Family Platanaceae 

 Genus Platamis Linnaeus 



Platanus pseudoccidentalis n. sp. 



Plate 40 ; plate 41 ; plate 42 



"Platanus n. sp." Hollick, Summary Rept. {loc. cit.), p. 135. 



Leaves trilobate, 20 to 23 centimeters in length by about the 

 same in width ; nervation 3-palmate, the lateral primaries supra- 



29 Saporta, Gaston de & Marion, A. F. Eeeherehes sur les vegetaux fossiles de 

 Meximieux. Mus. d'Hist. Nat. Lyon, Arch. vol. 1, p. 2G4, pi. 31, figs. 4—7; pi. 32, 

 fig. 1. 1872. 



30 Knowlton. F. H. Flora of the Latah formation of Spokane, Washington, and 

 Coeur d'Alene, Idaho, [in] Pardee, J. T., and Bryan, Kirk. Geology of the Latah for- 

 mation, etc.: U. S. Geol. Survey, Prof. Paper 140-A, p. 30, pi. 12, figs. 8-10; pi. 13, 

 figs. 1-7; pi. 14, figs. 1-3; pi. 15, figs. 3-5 [=P. heteromorpha] ; pi. 15, fig. 2; pi. 16, 

 figs. 1-3 [= P. Fairii]. 1926. 



