DESCRIPTION OF SPECIES— JUGLANDEJ3. 285 



divergence, are simple or sparingly branching, connected by very thin distant 

 ncrvilles in right angle to the veins. As remarked in Report, 1871 {loc. cU.), 

 it is difficult to decide if these leaves represent a Juglans or a Rhamnus. 

 Prof. Ileer has, in Arct. FL, i, p. 123. pi. xlix, fig. 10, a leaf whose characters 

 are much like those of this species; the lateral nerves are, however, more 

 oblique to the midrib, all simple, and straight to the borders. It is described 

 as Rhamnus Erulani. The author remarks on this leaf, that, but for the 

 straight secondary nerves, it should be referable to Jitglans. Therefore the 

 curved secondary nerves of our species relate it to this genus. But in the 

 leaves which represent it, the lateral veins are somewhat closer, and pass 

 nearer to the borders than in any species of Juglans, except perhaps J. 

 acuminata, Al. Br., which, in Fl. Alas., pi. ix, fig. 1, is represented by FLeer 

 with secondary veins equidistant and reaching nearer to the borders than 

 in any other figure of this species. J. rhaninoides is therefore closely 

 related to J. acuminata, and, as it bears the same relation to J. rugosa and 

 J. Leconteana, Lesqx., they all may be mere varieties of the polymorphous 

 ./. acuminata, which has been found in the whole extent of the Miocene of 

 Europe. This species is apparently identical with Cornus acuminata, Newby. 

 Habitat. — Spring Canon, Montana {Dr. F. V. Harjden). Not rare at 

 Black Buttes, Wyoming. Point of Rocks, Wyoming {Dr. F. V. Haydcn). 



Julians Lrcoiiteaiia, Lesqz. 



Plate LIV, Figs. 10-13. 



Leaves bro.adly ovate, gradually acuminate, narrowed and rounded to a short petiole ; borders 

 undulate; nervation coarse, thick; lateral nerves on an acute angle of divergence, slightly curved in 

 passing to the borders. 



Tiiis species or form was merely mentioned in Annual Report, 1869, 

 p. 197, and I was a long time in doubt if it could really be separated from 

 the following. From it and from all the figures which represent J. acii- 

 mi7iata, it differs by comparatively shorter and broader leaves, which are 

 first rounded and then abruptly curved or narrowed to the short petiole; 

 by the lateral nerves on a more acute angle of divergence, 40°, passing 

 nearly straight toward the borders, with their simple bows nearer to them, 

 a nervation resembling that of Rhamnus still more distinctly than that of 

 the former species. There, are no intermediate tertiary veins; the fibrilkp, 

 at right angle to the nerves and obliquely branched, compose an irregularly 

 quadrate or polygonal areolation. 



Habitat. — Marshall's Mine, Colorado, the fragments represented in figs. 



