524 Descriptions of Fossil Plants. 



POPULUS FLABELLUM Newb. 



Desc. Leaves flabellate, orbicular or reniform, obtuse, 

 wedge-shaped at base, slightly decurrent onto the petiole. 

 Margins entire or waved; principal nerves three, two 

 lateral ones reaching nearly to the summit ; secondary 

 nerves fine, flexuous, forked. 



There is no living species of Populus of which the nor- 

 mal form of the leaves approaches very closely to that of 

 those under consideration, though one, three-nerved like 

 these, may be occasionally found among the round-leaved 

 po])lars. Among the Tertiary plants collected by Dr. 

 Hayden on the Yellow Stone, is a species yet unpub- 

 lished very much like this, both in the form and nerva- 

 tion of the leaves, and among the Cretaceous plants col- 

 lected by the same geologist in Nebraska, is another 

 nearly equally like ; but in both these the upper margins 

 of the leaves are more or less crenulated. 



Formation and locality. Miocene strata, Bellingham 

 Bay. W. T. 



Ficus ? cuNEATUs Newb. 



Desc. Leaves obovate or elliptical, shortly acuminate 

 at summit, wedge-shaped at base, decurrent onto the 

 petiole ; nervation distinct, flexuous, reticulated ; midrib 

 strong; lateral nerves eight or nine pairs gently arched 

 upward, the lower ones curved at the extremities, anasto- 

 mosing near the margin, the upper ones forked above 

 the branches, meeting and forming a coarse net-work. 



The specimens of this plant are too few and too ob- 

 scurely preserved to permit my accurate determination ; 

 for the present it may be left in the genus Ficus, to some 

 species of which it certainly bears a close resemblance, 

 both in outline and nervation. 



Formation and locality. Cretaceous strata, Orcas Isl- 

 and. 



