FOSSIL FLORA. 693 



Florissant, Colorado. It differs essentially in having rather numerous 

 secondaries, which parallel enter the somewhat sharper teeth. M. fallax 

 Lx., 1 also from Florissant, is evidently related, but lias much larger, sharp 

 teeth, and nervation as in 31. polymorpha Lx, 



Habitat: Fossil Forest Ridge, bed No. 5, "Salix bed;" collected by 

 "Ward and Knowlton, August 19, 1887. 



Myrica lamarensis n. sp. 

 PI. LXXXIY, fig. 5. 



Leaf firm in texture, narrowly lanceolate, narrowed below, apparently 

 acuminate at apex; margin at some distance above the base, provided with 

 numerous, small teeth: petiole short; midrib rather thick, straight; nerva- 

 tion pinnate, camptodrome, the secondaries joining and forming a thin line 

 from inside the border; other nervation destroyed. 



The little leaf has only the lower portion preserved. It is now 3.5 cm. 

 in length, and when entire was probably not less than 6 cm. long. It is 

 only 7 mm. broad, and has a short petiole about 2 mm. in length. The 

 nervation is also destroyed, except the midrib and about a dozen secon- 

 daries, which are seen to be alternate. They arch and join, producing a 

 marginal line just inside the margin. 



This little leaf does not appear to have an)* very close relative in 

 this country. Those approaching nearest, perhaps, are the narrow leaved 

 species so common at Florissant, Colorado, such as M. fallax Lx., 2 and M. 

 scottii Lx. 3 They differ markedly, however, in the sharply serrate margin 

 and craspedodrome nervation. 



Myrica banksicefolia Ung., as figured by Heer 4 from the Baltic Miocene, 

 is perhaps nearer to our species. This has the narrowed base and similar 

 teeth, but differs in the apex and in the nervation. 



Habitat: East bank of Lamar' River, between Cache and Calfee 

 creeks; collected by F. H. Knowlton, August 21, 1888. 



'0,,. cit,, ]i. M7, PI. XXXII, figs. 11-16. 

 -Cret. and Tert. FI. p. 147, PI. XXXII, figs. 11-16. 

 :, Loc. cit. p. 147, PI. XXXII, ligs. 17, IS. 

 •'Mioc. Bait. Fl., p. 67, PI. XVIII, fig. 4. 



