FOSSIL FLORA. 751 



texture of tlie lent', and nervation. It ditfers in l)eino- alniotst twice the size 

 of tlie li\'inii- form ami in liaviny coarse nervation. It lias also a short })etiole. 

 llal)itat: Yellowstone Kiver, one-half mile l)elow mouth of Elk Creek; 

 collected by F. H. Knowlton. 



EBEXACE.E. 



DiOSPVROS I'.liACHYSEPALA Al. l)r. 



JHospyroN lirarliyscpain Al. Br. Ward: Type.s of the. Laramie Fl.. ji. 1(14, PI. XLIX, 

 figs. 1, 2. 



A tiuely preserve<I leaf, aluKist identically tlie same as A^'ar(^s fig. 2, 

 except that the secondaries are a little closer together. 



Habitat: Fossil Forest Ridge, bed No. 4, "Aralia Ijed;" collected by 

 Ward and Knowlton, August, 1S,S7. 



DiOSPYROS LAMAKENSIS n S]1 

 PI. XCV. ligs. 5, 6; PI. XGVI, tig. 4. 



Leaf membranaceous, regularly elliptical or ovate-elliptical, equally 

 rounded at base and apex, or slightlv broader at base; ])etiole not preserved, 

 ajjparently with a slight wing; midrib thin, straight; secondaries 7 or 8 

 pairs, alternate, thin, camptO(h-ome, arising at an angle of 45° or 50°, pass- 

 ing straight toward the borders, near which they arch and join by loops to 

 the secondary next above; intermediate secondaries occasional, thin, usualh' 

 joining the secondary next l)elow; tiner ner\ation consisting of luimerous 

 irregular nervilles, ])roducing irregularly (juadrangular areola\ 



This species is aliout 5 cm. long and a little more than 3 cm. wide, and 

 is (piite regularly elliptical in shape. As stated, the petiole is not preserved, 

 l)ut judging from the base of the blade it seems probable that it was 

 slio-htlv wino'ed. The lower pair of secondaries arise from the very base of 

 the blade and are verA" thin; the others are all alternate and camptodronie. 

 One of the other leaves figured is approximately of the same shape, but 

 has slightly more indication of having had a winged petiole. It is rounded 

 at base and has a loose nervation, as in the other. 



This species is cdosely related and possibly iilentical with J)i(ispi/ros 

 loiKana Lx.,^ from Florissant, Colorado. This latter species differs in being 



Tert. Fl., p. 232, PI. XL. fig. 11; Cret. and Tert. FL, p. 175, PL XXXIV, tig, 3. 



