FLORA OF THE DAKOTA GKOUP. 35 



DICOTYLEDONES. 



MYKICACE^. 



MYRICA, Linn. 



Myrica obtusa, Leaqx. 



" U. S. Geol. Eep.," yi, p. 63, pi. xxix, fig. 10. 



Myrica Dakotensis, Lesqx. 



Plate IV, Fig. 9. 



M. cretacea,^ Lesqx., Hayden's "Ann. Rep.," 1874, p. 339, pi. iii, fig. 4. 



Leaves narrowly lanceolate or lineal-oblong, gradually narrowed to a thick short 

 petiole, crenulate on the borders; medial nerve flat and broad; lateral nerves at an 

 acute angle of divergence, parallel, variable in distance, camptodrome; tertiary veins 

 short, anastomosing with the secondary ones by nervilles at right angles. 



The substance of the leaves is thick, coriaceous, the surface polished, 

 the borders slightly reflexed and crenulate; the upper end of both the 

 leaves representing the species is destroyed, but on fig. 9 the apex seems 

 rounded or obtuse. They are 7 to 8 centimeters long and about li centi- 

 meters broad in the middle. 



The relation of these leaves is more distinctly marked with 31. Schenki- 

 ana, Heer, "Quedl. FL," p. 11, pi, iii, fig. 1, and less distinctly with M. 

 cretacea, Heer, ibid., p. 10, pi. iii, figs. 2a, b, c. They are more lineal, the 

 borders less deeply and more closely denticulate, the veins closer, etc. 

 By their hard texture and their nervation the leaves are also comparable 

 to those of some tropical species of Salix. 



Hab. — Fort Harker, Kansas. Chs. Sternberg. 



Myrica Sternbergii, sp. nov. 



Leaves long, linear-lanceolate; borders distantly obtusely dentate; lateral veins 

 at acute angles of divergence, comparatively thick, flexuous, simple or forking above 

 the middle, the divisions entering the teeth in curving along the borders. 



The specimen represents only a fragment of a leaf whose upper and 

 lower parts are destroyed. The fragment is 7 centimeters long and 3 

 broad; the secondary veins or their primary divisions enter the teeth by 



^Myrica cretacea, Heer, was, perhaps, published iu the "Flora of Quedlinburg" before I described my 

 species under the same name. But that work of Heer was then unknown to me. I change name, not being 

 certain who has priority for it. 



