FOSSIL FLORA. -no 



( o 



9 



passin-tlin.uoli tli<- nii.l.U*. „f tli,- l.la.h-: ser.Midaric-s about ,S pairs, alter- 

 nate, strong-ly caniptoan.ine, fV.rniinj.- bread loops at a marked distance 

 troni the niarg-in, occasionally with a series of smaller loops ..utside; inter- 

 mediate secondaries occasional; nervilles fexx-, percurrent; finer nervation 

 forming- large quadrangular meshes. 



The specimens figured are the only ones observed of this species. The 

 best preserved is a little over 10 cm. in length and 4 cm. broad. It is 

 marked by the long-, slender, and falcate apex, and the peculiar looped 

 secondaries, which are joined far inside the margin. One side of fixe basal 

 portion of the leaflet is missing, but from the .lirection of the secondaries 

 it is probable that it was somewhat unequal-sided. 



Fig-. 1, 1>1. XC'VIII, which lacks both base and apex, nrast liave been 

 ai least 13 cm. in length, and was probably long-er. The other (fig. 2, PL 

 XCATII) was alx.ut the size of the best-preserved example. 



These leaflets very closely resemble Fraxinus affims Newl)y,ifrom 

 Bridge Creek, Oregon. This has the same type of nerNation, but* is nuu-h 

 smaller, very .slightly unequal-sided, an.l with more numer<ms and more 

 reguhu- looped secondaries. The finer nervation is identical in each. 



There is some doubt as to the correctness of the reference of New- 

 berry's leaf to the genus Fraxinus. This nuicli resembles the genus 

 Sapmdus and may possil)ly belong to it. Sapindm fframUfonoius Ward'' 

 from the Fort Union group, for example, has nuich resemblance in general 

 character to these leaves. It would seem that they should all l)e^in the 

 same genus. However, the leaflet under consideration is undoubtedly 

 closely allied to what Ward has called Sapindus, and for the present thev 

 may remain there. 



I have named this characteristic sjiecies in houoi- of Prof Lester F. 

 Ward, who was present when it was collected. 



Habitat: Fossil Forest Ridge, bed No. 5; collected bv Lester F ^Vard 

 and F. H. Knowlton, August 16-19, 1887. Yellowstone River, one-half 

 mile below mouth of Elk Creek; collected bv F. H. Knowlton Au-ast 

 1888. ■ ' '^ ■ ' 



' U. S. Nat. Mus., Vol. V, 1882. ].. .510: Plates (iued). PI. XLIX. fig. 3. 

 -Types of tbe Laramie Fl., p. ii7. PI. XXX, figs. 4, 5. 



