88 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



the contrast in appearance which they present to oaks, poplars, prunes, 

 etc., with which they are associated; this is also indicated by the delicate, 

 open, and flexuous nervation. 



Formation and locality: Tertiary (Miocene). Cook Inlet, Alaska. 



Ficus planicostata Lesq.f 



PI. XLVI, fig. 1. 



Hayden's Ann. Rept., 1872 [1873], p. 393; Tert. Fl. (1878), p. 201, PL XXXI, figs. 

 1-8, 10-12. 



The leaf here figured is hardly sufficient for satisfactory determination ; 

 it is imperfect at the summit and throughout part of the margin ; however, 

 the insertion of the petiole and the nervation give it characters which are 

 separated widely from any other leaves with which it is associated in the 

 collection. The petiole is broad, and is inserted obliquely in the base of 

 the leaf. The nervation is beautifully camptodrome, the branches of the 

 basal pair of lateral nerves, as well as the summits of the lateral nerves 

 above, forming a most beautiful and regular festoon. This is essentially 

 the nervation of F. planicostata, and although the specimen is much smaller 

 and narrower than the average of the leaves ascribed to that species, I have 

 thought best to refer it doubtfully to this place until further material will 

 permit the definitive settlement of the question. 



Formation and locality: Tertiary (Miocene). Bridge Creek, Oregon. 



Ficus reticulata (Lesq.) Hollick. 



PI. XII, figs. 2, 3. 



Laurophyllum reticulatum Lesq. Hayden's Ann. Rept. 1872 [1873], p. 425; Cret. 



Fl. (1874), p. 76, PI. XV, figs. 4, 5. 

 Ficus laurophyllum Lesq. Hayden's Ann. Rept. 1874 [1876], p. 342, PI. V, fig. 7. 

 Ficus laurophylla Lesq. Cret. and Tert. Fl. (1883), p. 49, PI. I, figs. 12, 13. 



Quite a number of specimens of these very distinctly marked leaves 

 are contained in the collection received from Mr. Sternberg from Fort 

 Harker, and still larger and finer ones since obtained through other channels 

 show that the leaves sometimes attained a size considerably greater than 

 that represented in fig. 2, but it was as wide and much longer. All these 

 are alike in showing a smooth and polished surface, a thick, leathery texture, 



