FOSSIL FLORA. 727 



secondaries at a very acute angle, craspedodrome, alternate, lower pair 

 thinnest, those above much thicker, branching on the outside, branches at 

 an acute angle, craspedodrome; intermediate secondaries several, generally 

 lost in the space between the secondaries; nervilles strong, at various 

 angles, mainly percurrent; finer nervation irregular. 



No perfect example of this species has been found, the fragments 

 figured being all that we have to represent it. The specimen showing the 

 wedge-shaped base is only 5 cm. long, but was probably 10 or 12 cm. in 

 length when perfect. It is 4 cm. wide. The larger of the others is the 

 wedge-shaped apical portion, and is 6 cm. long, with the probability of its 

 having been at least 12 cm. long. The small specimen was probably 

 hardly more than 8 or 9 cm. in length when perfect. The upper portion 

 appears to have more numerous secondaries than the lower part. They are 

 also branched on the outside. 



Habitat: Yellowstone River, 1 mile below the mouth of Elk Creek; 

 collected by F. H. Knowlton, August, 1888. 



ClNNAJIOMUM SPECTABILE Heer. 



PI. XCIT, fig. «. 

 Cinnamomum spectabile Heer: Fl. Tert. Helv., Vol. II, p. 91, PL XCVI, figs. 1-S. 



The leaf figured, which appears to be the only one obtained, differs 

 slightly from the figures of the European form to which it is referred. The 

 lower pair of secondaries, for example, are nearer the base of the leaf than 

 in the figures given by Heer, but, granting the slight differences, I have 

 hesitated to make it a new species. 



Habitat: Tower Creek, Yellowstone National Park; collected by 

 Arnold Hague (field No., 1036), August 16, 1883. 



PLATANACEjE. 



PlataNUK GUILLELM/E Gropp. 



PI. XGVI, fig. 1: PI. XCVII, fig. 5. 



This species is very abundant, being represented by over 125 more or 

 less perfect specimens. Some of these — as, for example, the one figured — 

 are particularly perfect. They differ somewhat in size, the average being 

 about 7 or 8 cm. broad between the lobes and 8 or 9 cm. in length. An 

 occasional one is 14 cm. broad and about the same length. 



