76 THE FLORA OP THE DAKOTA GROUP. 



Order URTICACE^. 



Tribe ARTOCARPE^E. 



Subtribe FICE^. 



FiCUS MACROPHYLLA, Sp. IIOV. 

 PI. XI, Fig. 1. 



Leaf very large and entire, coriaceous, polished on the surface, oblong- 

 lanceolate, moderately curved in naiTowing to the petiole, apparently obtuse 

 (base and apex destroyed), penniuerved; median nerve very thick; second- 

 aries numerous, alternate, nearly at right angles, undulate, forking in the 

 middle or above, curving and anastomosing at a distance from the borders 

 in double or repeated bows, separated by tertiary, thinner ner\es, the areas 

 being covered by large, square areoles formed by nerWlles at right angles 

 to the nerves. 



Though lacerated the leaf shows its size to be at least 30""" in length, 

 10°" in width below the middle. The nervation as well as the large areoles 

 formed by the nervilles in joining the intermediate tertiary nerves at right 

 angles are deep and quite distinct. By its nervation, at least, the leaf is 

 comparable to that of F. rectinervis Ett.,^ which, however, is of a different 

 form. But it is has a greater degree of affinity to a living as yet undeter- 

 mined species, of which Prof, von Ettingshausen has I'eproduced the 

 impression of a leaf," remarking that the plant is cidtivated in the garden 

 of Schoenbrunn, Vienna. The essential characters of both the fossil and 

 the living leaves r,re the same, except that the fossil leaf is some^A-hat larger. 



Habitat : Near Fort Harker, Kansas. No. 60 of the Museum of Com- 

 parative Zoology of Cambridge, Massachusetts. 



Ficus GLASCOENA Lesq. 

 PI. XIII, Figs. 1, 2. 



Cret. aud Tert. FL, p. 48. 



Leaves large, thick, coriaceous, polislied on the surface, oblong-lanceo- 

 late, obtusely pointed, narrowed in a curve and declining to the petiole; 

 median nerve very broad, secondaries thin, at a broad angle of divergence, 



I Foas. Fl. Sagor, pt. 1, PI. vm, Fig. 17. 

 »Fos». Fl. BiliD, pt. 1, PI. XIX, Fig. 4. 



