FLORA OF THE DAKOTA GROUP. 63 



much lower than the middle, are 7 to 10 centimeters long and 3 to 3* centi- 

 meters broad. The primary nerves are comparatively narrow; the form of 

 the lobes is oblong, the point somewhat obtuse, the sinuses broad and also 

 obtuse. The secondary nerves distant, nearly simple, at an open angle of 

 divergence, pass toward the borders in curves and follow them in festoons, 

 anastomosing by nervilles with those above. They are generally sepa- 

 rated by short tertiary veins forming by ramifications in more or less 

 oblique directions, square or polygonal, large meshes. 

 Hah. — Clay Centre, Kansas. H. C. Towner. 



A r alia subemarg-iiiata, sp. nov. 



Leaves of medium size, thick, coriaceous, five-palmate, cuneate to the base; lobes 

 cut to the middle of the leaves, entire, obovate, roundeil or eniarginate at the apex ; 

 primary nerves in three, the lateral forking near the base; venation camptodrome. 



The lobes of this leaf are nearly equal in length, about 5 centimeters 

 long from the narrow obtuse sinuses, o to 6 centimeters broad in the 

 upper part; lateral veins few, distant, 3 or 4 pairs, some of them forking 

 on the lower side, much curved in passing to the borders. This species 

 is closely allied to the preceding, differing by the short, obovate, rounded 

 or emarginate lobes and the nervation. The only specimen seen is No. 

 810 of the Museum Comp. ZooL, Cambridge. 



Hah. — Three miles southeast of Fort Harker, Kansas. Chs. Sternherg. 



Aralia tenuinervis, sp. nov. 



Plate Vn, Fig. 4. 



Leaf small, truncate at base, palmately five-lobed ; lobes much diverging, lance- 

 olate or linear-lanceolate, acute; sinuses broad and obtu.se; primary nerves thin, flex- 

 uous, apparently diverging from the same point near the base of the leaf; lateral veins 

 close, parallel, camptodrome. 



The base of the leaf is destroyed and the point of union of the lateral 

 nerves is not seen. It appears to be about like that of fig. 3 of the same 

 plate, a leaf related by its shape. The thin primary nerves, the close 

 lateral thin veins, separate this species from all the others described above. 

 Its type is that of Aralia angusiiloha, Lesqx., of the Chalk Bluffs of the 

 Gold-gravel formation of California. 



Hah. — Clay County, Kansas. H. C. Towner. 



