FOSSIL FLORA. 751 



texture of the leaf, and nervation. It differs in being almost twice the size 

 of the living form and in having coarse nervation. It has also a short petiole. 

 Habitat: Yellowstone River, one-half mile below mouth of Elk Creek; 

 collected by F. H. Knowlton. 



EBENACE.E. 



DlOSPYROS BRACHYSEPALA Al. Br. 



JHospyros braehysepala Al. Br. Ward: Types of the Laramie Fl., p. 104, PI. XLIX, 



'figs. 1,2. 



A finely preserved leaf, almost identically the same as Ward's fig. 2, 

 except that the secondaries are a little closer together. 



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

 Ward and Knowlton, August, 1887. 



DlOSPYROS LAMARENSIS U. Sp. 

 PI. XCV, figs. 5, 6; PL XCVI, fig. 4. 



Leaf membranaceous, regularly elliptical or ovate-elliptical, equally 

 rounded at base and apex, or slightly broader at base; petiole not preserved, 

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

 pairs, alternate, thin, camptodrome, 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, usually 

 joining the secondary next below; finer nervation consisting of numerous 

 irregular nervines, producing irregularly quadrangular areola?. 



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

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

 but judging from the base of the blade it seems probable that it was 

 slightly winged. The lower pair of secondaries arise from the very base of 

 the blade and are very thin; the others are all alternate and camptodrome. 

 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 closely related and possibly identical with Diospyros 

 wpeana Lx., 1 from Florissant, Colorado. This latter species differs in being 



iTert. PL, \>. 232, PL XL, tig. 11; Cret. and Tert. PL, i>. 175, PL XXXIV, tig. 3. 



